In الرجل الذي اتصل “the man who called,” the relative clause modifies an expressed antecedent, الرجل. Arabic can also omit that noun entirely: من اتصل can mean “the person who called” or, depending on context, “whoever called.” A relative expression with no overt antecedent is called a headless or free relative.
Formal Modern Standard Arabic normally uses من for people and ما for things, actions, facts, or whole propositions. The same written forms are also interrogatives—من؟ “who?” and ما؟ “what?”—so their function must be read from the larger sentence, not from the word alone. Where an internal preposition or possessive relation needs a suffix, the rules from Resumptive Pronouns still apply.
The basic division: human من, nonhuman ما
| Form | Typical reference | Free-relative meaning | Interrogative meaning |
|---|---|---|---|
| من | human or rational referent | the person who; whoever; those who | who? |
| ما | thing, content, action, or proposition | what; whatever; that which | what? |
Both forms are invariant: they do not visibly change for gender, number, or case. Nevertheless, the whole free relative occupies an ordinary case position in its larger sentence. In أساعد من يحتاج, the phrase من يحتاج is the direct object of “I help”; in تحدثت مع من أرسلتهم الشركة, it follows مع. The form من stays the same.
أساعد من يحتاج إلى دعم إضافي.
ʾusāʿidu man yaḥtāju ʾilā daʿmin ʾiḍāfiyy.
I help whoever needs additional support.
سأفعل ما طلبته مني.
sa-ʾafʿalu mā ṭalabtahu minnī.
I will do what you asked me to do.
In the second example, ما refers to the requested thing or action. The suffix ـه in طلبته resumes that content as the object of طلبت. English has only one visible what; Arabic uses both ما and, here, an internal resumptive.
A free relative replaces the entire noun phrase
Do not place من or ما after an ordinary antecedent as though they were alternative spellings of الذي. Compare three architectures:
| Architecture | Arabic | Meaning |
|---|---|---|
| definite antecedent | الموظف الذي يساعد الزوار | the employee who helps visitors |
| indefinite antecedent | موظف يساعد الزوار | an employee who helps visitors |
| headless relative | من يساعد الزوار | whoever / the person who helps visitors |
أحترم الموظف الذي يعامل الجميع بإنصاف.
ʾaḥtarimu l-muwaẓẓafa lladhī yuʿāmilu l-jamīʿa bi-ʾinṣāf.
I respect the employee who treats everyone fairly.
أحترم من يعامل الجميع بإنصاف.
ʾaḥtarimu man yuʿāmilu l-jamīʿa bi-ʾinṣāf.
I respect anyone who treats everyone fairly.
The first sentence points to a definite employee. The second deliberately leaves the person unrestricted: the description itself identifies the relevant people.
Agreement with من: form versus meaning
Because من has one invariant shape, subsequent agreement can follow its grammatical wording (masculine singular) or its understood referent. Masculine singular agreement is especially common when the reference is open-ended or proverbial.
من يحضر مبكرا يجد مقعدا أفضل.
man yaḥḍur mubakkirā yajid maqʿadan ʾafḍal.
Whoever arrives early finds a better seat.
Here من is conditional as well as headless: the two jussive verbs present a general “whoever” relationship. The masculine singular form does not mean that women are excluded.
When a known plural group is intended, formal Arabic can reflect the meaning with plural agreement, particularly after the reference becomes clear.
من حضروا الدورة سجلوا أسماءهم عند المدخل.
man ḥaḍarū d-dawrata sajjalū ʾasmāʾahum ʿinda l-madkhal.
Those who attended the course registered their names at the entrance.
Writers also use singular agreement first and plural agreement later, following wording and then meaning. This is established, but consistency is clearer for learners. If a specific definite plural group is central, الذين or اللاتي is often less ambiguous than free-relative من.
For a specifically identified woman, semantic feminine agreement is possible:
سأشكر من ساعدتني في إعداد التقرير.
sa-ʾashkuru man sāʿadatnī fī ʾiʿdādi t-taqrīr.
I will thank the woman who helped me prepare the report. (The context identifies her as female.)
Without that context, masculine singular ساعدني gives an open “whoever helped me” reading.
Agreement with ما
ما has no masculine/feminine or singular/plural paradigm. When it refers to an event, fact, or unspecified content, masculine singular agreement is common in the surrounding predicate.
ما حدث أمس مهم للتحقيق.
mā ḥadatha ʾamsi muhimmun li-t-taḥqīq.
What happened yesterday is important to the investigation.
If ما retrieves a more specific understood noun, later agreement can follow that meaning, but forcing a hidden English noun into every sentence is unhelpful. In ما حدث, the expression denotes an event or fact as a whole.
Interrogative or relative?
At the beginning of a direct question, punctuation and intonation make the interrogative reading clear.
من اتصل بك بعد الاجتماع؟
mani ttaṣala bika baʿda l-ijtimāʿ?
Who called you after the meeting?
ما الذي تغير في النسخة الجديدة؟
mā lladhī taghayyara fī n-nuskhati l-jadīda(h)?
What changed in the new version?
Inside a larger statement, the same form may introduce an indirect question or a free relative. Sometimes the distinction is semantic rather than visibly syntactic:
- لا أعرف من اتصل asks about an unknown identity: “I do not know who called.”
- سأكافئ من اتصل أولا identifies a participant by the clause: “I will reward whoever called first.”
Do not decide solely from word order. Ask whether the larger verb selects an unresolved question (know, ask, discover) or treats the expression as a person/thing (help, reward, take, do).
Resumptives inside headless relatives
When the person or thing has a prepositional or possessive role inside the clause, Arabic makes that relationship explicit with a matching suffix.
استشر من تثق بخبرته.
ʾistashir man tathiqu bi-khibartih.
Consult someone whose expertise you trust.
هذا ما اتفقنا عليه في الجلسة السابقة.
hādhā mā ttafaqnā ʿalayhi fī l-jalsati s-sābiqa(h).
This is what we agreed on in the previous session.
In بخبرته, the suffix marks the person's expertise; in عليه, it is the object required by اتفق على. English can strand on at the end. Formal Arabic cannot leave على bare.
Near, far, and discourse retrieval
هذا ما... and ذلك ما... package a following free relative as the predicate of a demonstrative. The contrast can be physical, contrastive, or discourse-organizing.
هذا ما اقترحه الفريق، وذلك ما وافقت عليه الإدارة.
hādhā mā qtaraḥahu l-farīqu, wa-dhālika mā wāfaqat ʿalayhi l-ʾidāra(h).
This is what the team proposed, and that is what management approved.
The second demonstrative need not point to a distant physical object. It can distinguish a second proposal in the discourse.
تغير الموعد في اللحظة الأخيرة، وهذا ما أربك المشاركين.
taghayyara l-mawʿidu fī l-laḥẓati l-ʾakhīrati, wa-hādhā mā ʾarbaka l-mushārikīn.
The time changed at the last minute, and that is what confused the participants. (formal expository link)
Here ما أربك المشاركين refers to the whole preceding event. It is not an interrogative “what?”
Common Mistakes
Treating “this book” as “this is a book”
❌ هذا كتاب هو ما طلبته.
Incorrect for “this book is what I requested” — the noun in the demonstrative phrase must be definite.
✅ هذا الكتاب هو ما طلبته.
hādhā l-kitābu huwa mā ṭalabtuh.
This book is what I requested.
Using الذي after an indefinite antecedent
❌ قابلت شخصا الذي يعرف المدير.
Incorrect — the antecedent is indefinite, so the adjectival clause has no alladhī.
✅ قابلت شخصا يعرف المدير.
qābaltu shakhsan yaʿrifu l-mudīr.
I met someone who knows the director.
Stranding a preposition
❌ سأدعو من تحدثت مع أمس.
Incorrect — maʿ requires a resumptive suffix referring to the person.
✅ سأدعو من تحدثت معه أمس.
sa-ʾadʿū man taḥaddathtu maʿahu ʾams.
I will invite the person I spoke with yesterday.
Ignoring the dual when an antecedent is expressed
❌ هذان الباحثان الذين تحدثت معهما قدما الورقة.
Incorrect — the expressed dual antecedent requires alladhāni, not plural alladhīna.
✅ هذان الباحثان اللذان تحدثت معهما قدما الورقة.
hādhāni l-bāḥithāni lladhāni taḥaddathtu maʿahumā qaddamā l-waraqa(h).
These two researchers whom I spoke with presented the paper.
Reading every من or ما as a question
❌ سأفعل ماذا اقترحته.
Incorrect — mādhā is interrogative here; do not use it for the headless relative “what you proposed.”
✅ سأفعل ما اقترحته.
sa-ʾafʿalu mā qtaraḥtah.
I will do what you proposed.
Key Takeaways
- من normally refers to people; ما refers to things, content, actions, or propositions.
- A headless relative is a complete noun phrase and replaces the antecedent; it does not follow one.
- The forms are invariant, although agreement after من may follow grammatical singular wording or the understood gender/number.
- Context distinguishes relative من/ما from direct and indirect interrogatives.
- Prepositional and possessive relations inside the clause still require resumptive suffixes.
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Start learning Arabic →Related Topics
- Relatives with Coordinated or Mixed AntecedentsB1 — Resolve gender, number, rationality, and resumptive agreement when one Arabic relative clause describes more than one antecedent.
- الذي as a Sentence-Linking DeviceB2 — Link a preceding proposition to its consequence with الأمر الذي, وهو ما, and the distinct formal connector مما.
- Near Demonstratives: هذا، هذه، هذان، هاتان، هؤلاءA1 — Choose near demonstratives by gender, number, case, and human reference, then combine them with definite nouns and relative clauses.