A root can be weak and belong to a derived form at the same time. وصّل is Form II of the initial-weak root و-ص-ل; اختار is Form VIII of the hollow root خ-ي-ر; سمّى is Form II of a final-weak root. The derived pattern contributes its consonantal frame, while the weak radical contributes its own vowel, glide, or spelling alternations.
Keep those two dimensions separate. “Form II” does not guarantee sound-root endings, and “weak” does not erase the form's argument structure. Most importantly, neither label predicts the complete lexical meaning. This page teaches recognition and inflection; the Derived Meaning and Derived Valency pages explain why each real verb still needs its own meaning and complement frame.
Focused map: و-ص-ل in three stems
One root can surface so differently that English learners assume the forms are unrelated. The three rows below share و-ص-ل historically and semantically: Forms I and II show و on the surface, while Form VIII does not.
| Stem | Perfect / b-imperfect | Participle | Maṣdar | Core frame |
|---|---|---|---|---|
| Form I | وصل / بيوصل wiṣel / byūṣal | واصل wāṣel | وصول wuṣūl | the arriver is subject |
| Form II | وصّل / بيوصّل waṣṣal / bywaṣṣel | موصّل mwaṣṣel | توصيل tawṣīl | someone delivers/transports an object |
| Form VIII | اتصل / بيتصل ittaṣal / byittiṣel | متصل mittaṣel | اتصال ittiṣāl | someone contacts في someone |
وصل السايق قبل الموعد بخمس دقايق.
wiṣel es-sēyeʾ ʾabel el-mawʿed b-khames dʾāyeʾ.
The driver arrived five minutes before the appointment. (neutral; Form I, intransitive)
وصل السايق الضيوف عالفندق ورجع.
waṣṣal es-sēyeʾ eḍ-ḍyūf ʿal-fondoʾ w-rizhiʿ.
The driver took the guests to the hotel and came back. (neutral; Form II, transitive)
اتصل السايق فينا لما صار تحت البناية.
ittaṣal es-sēyeʾ fīna lamma ṣār taḥt el-binēye.
The driver called us when he was downstairs by the building. (informal; Form VIII with في)
Initial weakness can become invisible
In Form II وصّل, the first radical و is still visible and the middle radical is doubled. In Form VIII اتصل, historical و has assimilated to the form's ت, giving doubled ت. That is why a purely visual search for و-ص-ل misses اتصل، اتصال، متصل.
This is regular historical morphology, but it does not mean learners can reverse-engineer every opaque form in conversation. Learn اتصل / بيتصل as a principal pair and record its complement في for a person.
بيتصل في بيه كل يوم بعد الشغل.
byittaṣel fī bayyo kill yōm baʿd esh-shoghol.
He calls his father every day after work. (informal; opaque initial-weak Form VIII stem)
ما بيتصل في حدا بعد الساعة عشرة.
ma byittaṣel fī ḥada baʿd es-sēʿa ʿashra.
He doesn't call anyone after ten o'clock. (informal; negative habitual keeps b-)
هيدا الجهاز مش متصل بالإنترنت هلق.
hayda l-zhēz mish mittaṣel bil-internet hallaʾ.
This device isn't connected to the internet right now. (technical; result-state participle)
The participle and maṣdar preserve the derived family: متصل، اتصال. They do not restore the missing و. Root knowledge explains relationships; actual lexical forms control production.
Hollow radicals alternate inside derived frames
Hollow roots can preserve a long vowel in one part of a derived paradigm and shorten or redistribute it before endings. Form VIII اختار / بيختار “choose” has long ا in the common perfect and nonpast, but the first-person perfect is اخترت. Its participle مختار and maṣdar اختيار preserve different pieces of the family.
| Function | Form | Reading |
|---|---|---|
| 3ms perfect | اختار | ikhtār |
| 1sg perfect | اخترت | ikhtaret |
| 3ms b-imperfect | بيختار | byikhtār |
| participle | مختار | mkhtār |
| maṣdar / lexical noun | اختيار | ikhtiyār |
اخترت هيدي النسخة لأنها أوضح.
ikhtaret hayde n-noskha laʾanna awḍaḥ.
I chose this version because it's clearer. (neutral; short hollow stem before 1sg -t)
عادة بيختار محل قريب من بيته.
ʿāde byikhtār maḥall ʾarīb min bēto.
He usually chooses a place near his home. (informal; long-vowel b-imperfect)
اختيارك منيح، بس بدنا نتأكد من السعر.
ikhtiyārak mnīḥ, bass baddna nitʾakkad min es-siʿer.
Your choice is good, but we need to check the price. (informal; maṣdar with possessive suffix)
Do not map “past” to a single visible stem. Both اختار and اخترت are perfect; person-conditioned morphology explains the difference.
Final weakness reshapes endings
Form II سمّى / بيسمّي “name, call” retains the doubled middle radical but its final weak radical changes before subject and object endings. Compare سمّى “he named,” سمّيت “I named,” and سماها “he named her.” The corresponding maṣdar is تسمية, and the passive/result participle مسمّى means “named / designated.”
| Environment | Form | Reading |
|---|---|---|
| 3ms perfect | سمّى | samma |
| 1sg perfect | سمّيت | sammēt |
| 3ms + 3fs object | سماها | sammēha |
| 3ms b-imperfect | بيسمّي | byisamme |
| result participle | مسمّى | msamma |
| maṣdar | تسمية | tasmiye |
سميت المجلد حسب اسم المشروع.
sammēt el-mzhallad ḥasab ism el-mashrūʿ.
I named the folder after the project. (professional; final-weak Form II before 1sg -t)
سماها نور على اسم إمه.
sammēha Nūr ʿala ism immo.
He named her Nour after his mother. (neutral; extended stem before object clitic)
الشارع مسمى على اسم شاعر لبناني.
esh-shēreʿ msamma ʿala ism shēʿer libnēne.
The street is named after a Lebanese poet. (neutral; result participle)
The middle doubling identifies Form II even when the final ending differs from sound علّم. Regularizing سمّى as though it ended in a stable consonant destroys the actual paradigm.
Derived pairs can mark valency and change of state
Hollow غيّر “change something” and Form V تغيّر “change / become different” contrast an external causer with a changing subject. Their weak middle radical appears as ي in many forms, while doubling remains central.
غيرنا ترتيب الفقرات قبل النشر.
ghayyarna tartīb el-faʾarāt ʾabel en-nasher.
We changed the order of the paragraphs before publication. (professional; transitive Form II)
ترتيب الفقرات تغير بعد المراجعة.
tartīb el-faʾarāt tghayyar baʿd el-mrāzhaʿa.
The order of the paragraphs changed after the review. (professional; inchoative Form V)
السعر ما عم بيتغير هالأسبوع.
es-siʿer ma ʿam byitghayyar hal-usbūʿ.
The price isn't changing this week. (neutral; negative progressive with b- retained)
English uses change for both valency patterns, so learners often omit the Arabic stem contrast. Lebanese morphology overtly distinguishes who acts on what from what changes by itself.
Another opaque family: اشترى
Form VIII اشترى / بيشتري “buy” is recognizably related across its own principal parts, but the weak final radical prevents a simple sound-root template: اشتريت “I bought,” مشتري “buyer / having bought.” The everyday meaning “buy” is lexical, not a predictable reflexive meaning of Form VIII.
اشتريت قهوة ومي قبل ما اطلع.
ishtarēt ʾahwe w-mayy ʾabel ma oṭlaʿ.
I bought coffee and water before heading out. (informal; final-weak Form VIII before 1sg -t)
ما بشتري خضرة قبل ما شوفها.
ma bishtre khoḍra ʾabel ma shūfa.
I don't buy vegetables before seeing them. (informal; negative habitual b-imperfect)
The full verb, not the abstract root or form number, tells you that اشترى takes a direct object. This is why a good lexical entry records perfect, b-imperfect, participle or maṣdar when frequent, and complement frame together.
Dialogue: arrival, delivery, and contact
وصلت الطاولة عالمحل ولا بعد؟
wiṣlet eṭ-ṭāwle ʿal-maḥall walla baʿd?
Maya: Has the table reached the shop yet? (Form I; intransitive arrival)
بعد ما وصلت، بس السايق رح يوصلها قبل الستة.
baʿd ma wiṣlet, bass es-sēyeʾ raḥ ywaṣṣela ʾabel es-sitte.
Karim: It hasn't arrived yet, but the driver will deliver it before six. (future bare Form II; valency contrast)
منيح، خليه يتصل فيي لما يقرب.
mnīḥ, khallīh yittaṣel fiyye lamma yʾarreb.
Maya: Good—have him call me when he gets close. (bare Form VIII after خليه)
Common Mistakes
Restoring a weak radical where the derived form lost it
❌ وتصلت فيه الصبح.
Incorrect — Form VIII اتصل has lost the historical و and doubled the form's ت.
✅ اتصلت فيه الصبح وتركتله خبر.
ittaṣalet fīh eṣ-ṣobeḥ w-taraktello khabar.
I called him this morning and left him a message.
Giving a final-weak Form II a sound ending
❌ أنا سممت الملف باسم المشروع.
Incorrect — سمّى is final-weak; first-person perfect is سمّيت, not a sound-root form.
✅ أنا سميت الملف باسم المشروع.
ana sammēt el-malaf b-ism el-mashrūʿ.
I named the file after the project.
Copying English ambitransitive “change”
❌ الخطة غيرت بعد الاجتماع.
Incorrect for ‘the plan changed’ — transitive غيّر expects an external changer.
✅ الخطة تغيرت بعد الاجتماع.
el-khiṭṭa tghayyarit baʿd el-izhtimēʿ.
The plan changed after the meeting.
Dropping b- in an independent habitual clause
❌ هو يتصل في بيه كل يوم.
Incorrect in ordinary Lebanese — an independent habit requires the b-imperfect.
✅ هو بيتصل في بيه كل يوم بعد الغدا.
huwwe byittaṣel fī bayyo kill yōm baʿd el-ghada.
He calls his father every day after lunch.
Adding b- after رح
❌ رح بيوصل الطلب بكرا.
Incorrect — رح selects the bare imperfect even with a derived weak verb.
✅ رح يوصل الطلب بكرا قبل الضهر.
raḥ ywaṣṣel eṭ-ṭalab bokra ʾabel eḍ-ḍoher.
He'll deliver the order tomorrow before noon.
Key Takeaways
Weakness and derived form are independent layers. Track the derived frame, then learn how that root behaves inside it: initial و remains in وصّل but disappears in اتصل; hollow اختار alternates with اخترت; final-weak سمّى alternates with سمّيت، سماها. Participles and maṣdars belong to the same lexical family but may preserve different vowels or consonants. Meaning, valency, and aspect still require separate decisions, so learn principal parts and complement frames rather than producing an MSA-style form from a root formula.
Now practice Arabic
Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.
Start learning Arabic →Related Topics
- Weak Verbs: An OverviewB1 — Recognize initial, hollow, final, and doubly weak Lebanese verbs and learn them reliably through principal parts rather than spelling guesses.
- Why Derived Forms Do Not Have One MeaningB2 — Learn to treat Arabic verb forms as lexical families whose tendencies must be checked against each verb's actual Lebanese meaning and frame.
- Derived Forms and Changes in ValencyC1 — See how Lebanese derived verbs add, suppress, or reorganize participants—and why every resulting frame must still be learned lexically.
- Form II faʿʿalB1 — Recognize the doubled middle radical of Form II and learn its causative, intensive, denominal, and fully lexical Lebanese verbs through principal parts and frames.
- Form VIII ftaʿalB2 — Recognize the mobile t of Form VIII, its sound assimilations, weak-root shapes, and lexical middle or reciprocal meanings in Lebanese.
- Maṣdars of Derived FormsB1 — Learn how urban Lebanese builds and actually uses the verbal nouns of Forms II–X, including regular patterns, colloquial pronunciation, and lexical exceptions.