An indefinite Egyptian noun normally takes a following descriptive clause without اللي: عايز كتاب يشرح النحو “I want a book that explains the grammar.” This zero marker is not sloppy omission. It packages a new or nonspecific referent together with the property that makes it relevant.
English uses who, that, or which after both definite and indefinite nouns, so the English word is a poor guide. Look at the Egyptian antecedent's definiteness; then build the internal subject gap, object clitic, or preposition-plus-clitic exactly as the clause requires. The broader contrast is mapped on definiteness and relative-clause choice.
Rule 1: a bare indefinite head takes a clause directly
The productive pattern is indefinite noun + clause. The clause can contain a verb, participle, adjective, locative predicate, or existential expression.
عايز كتاب يشرح الضرايب بطريقة بسيطة.
ʿāyiz kitāb yishraḥ iḍ-ḍarāyib biṭarīʾa basīṭa.
I want a book that explains taxes simply.
فيه بنت مستنياك عند البوابة.
fīh bint mistannyāk ʿand il-bawwāba.
There's a woman waiting for you at the gate.
محتاجين مكان يكون هادي بعد الضهر.
miḥtāgīn makān yikūn hādi baʿd iḍ-ḍuhr.
We need a place that is quiet in the afternoon.
The noun and its description introduce one discourse unit. Adding neutral اللي would make the head sound as though it were already uniquely identifiable or specially isolated from a known set.
Rule 2: compare indefinite zero with definite اللي
The best diagnostic is a minimal discourse contrast. First mention introduces an indefinite referent with zero; later mention makes that referent accessible and takes اللي.
قابلت محامية بتشتغل في قضايا الشركات.
ʾābilt muḥāmya bitishtaghal fi ʾaḍāya sh-shirkāt.
I met a lawyer who works on corporate cases.
المحامية اللي قابلتها هتكلمنا بكرة.
il-muḥāmya lli ʾābiltaha hatkallimna bukra.
The lawyer I met will call us tomorrow.
The first relative has a subject gap and no linker. The second has a definite head, اللي, and a feminine object suffix ـها. Definiteness and gap type are two independent decisions.
لقينا أوتيل فيه أوض فاضية.
laʾēna ʾōtēl fīh ʾuwaḍ fāḍya.
We found a hotel that has vacant rooms.
الأوتيل اللي لقيناه قريب من البحر.
il-ʾōtēl illi laʾēnāh ʾarīb min il-baḥr.
The hotel we found is near the sea.
Rule 3: object and prepositional resumption survive zero linking
Deleting اللي after an indefinite noun does not delete the pronoun required inside a non-subject relative.
اشتريت كرسي جربته في المحل.
ishtarēt kursi garrabtu fi l-maḥall.
I bought a chair that I tried in the shop.
شفنا شقة أصحابنا ساكنين فيها.
shufna shaʾʾa ʾaṣḥābna sāknīn fīha.
We saw a flat that our friends live in.
فيه واحدة مديرها عايز يكلمك.
fīh waḥda mudīrha ʿāyiz yikallimak.
There's a woman whose manager wants to speak to you.
The suffixes resume كرسي as an object, شقة after في, and واحدة as possessor of مدير. English gaps or whose do not alter the Egyptian local structure.
Rule 4: indefinite can still be specific
An antecedent can refer to one particular individual known to the speaker yet remain indefinite because it is new to the listener. Specificity does not automatically license اللي.
اتصل بيا دكتور اسمه فادي بخصوص التحاليل.
ittiṣal biyya duktōr ismu Fādi bikhuṣūṣ it-taḥālīl.
A doctor named Fadi called me about the tests.
The speaker clearly has one doctor in mind, but دكتور is introduced without the article. The following possessor clause اسمه فادي therefore has zero linking.
اشتغلت مع شركة مقرها في الجيزة.
ishtaghalt maʿ shirka maʾarrahā fi l-Gīza.
I worked with a company whose headquarters is in Giza.
Again, a specific company can be introduced indefinitely. On later mention, الشركة اللي مقرها... becomes natural.
Rule 5: marked اللي after an indefinite needs a discourse reason
Contemporary Egyptian does sometimes use اللي after a formally indefinite head when the speaker gives the description a strongly identifying, contrastive, or exclamatory role. This is attested variation, not the neutral beginner pattern.
قال كلام، اللي بصراحة محدش فهمه.
ʾāl kalām, illi biṣarāḥa maḥaddish fihimu.
He said things—which, honestly, nobody understood.
The pause makes the اللي clause an afterthought about the preceding discourse, not an integrated restrictive description equivalent to neutral كلام محدش فهمه. Speaker judgments vary. Use zero for an ordinary integrated indefinite relative; recognize marked اللي as discourse packaging rather than declaring every occurrence wrong.
(formal/MSA) Formal Arabic also normally links an indefinite noun to a descriptive clause without an inflected relative pronoun. The surface resemblance does not make the Cairene clause an MSA sentence: verbs, agreement, negation, pronunciation, and lack of case endings remain Egyptian.
Descriptive clause or new main event?
Prosody and meaning distinguish an integrated relative from a sequence of events. An integrated clause stays attached to the noun; a pause can launch a new assertion.
دخل راجل شايل كرتونة كبيرة.
dakhal rāgil shāyil kartōna kibīra.
A man carrying a large box came in.
دخل راجل، وشال الكرتونة الكبيرة.
dakhal rāgil, wi-shāl il-kartōna l-kibīra.
A man came in and carried the large box.
The first describes which newly introduced man; the second narrates two events. English punctuation helps in writing, but natural phrase grouping does the work in speech.
Near, far, and the definiteness switch
An indefinite noun can be located with هنا/هناك, but once ده/دي/دول selects it attributively, the phrase becomes definite and uses اللي.
فيه شنطة هناك محدش عارف صاحبتها.
fīh shanṭa hunāk maḥaddish ʿārif ṣāḥbitha.
There's a bag over there whose owner nobody knows.
الشنطة دي اللي هناك صاحبتها عند الأمن.
ish-shanṭa di lli hunāk ṣāḥbitha ʿand il-ʾamn.
The owner of that bag over there is with security.
Near versus far is expressed by context and هناك; the switch from zero to اللي comes from definiteness.
A pointing and identification dialogue
عايزين حد يعرف يصلح الماكينة دي.
ʿāyzīn ḥadd yiʿraf yiṣallaḥ il-makīna di.
We need someone who knows how to fix this machine.
فيه فني واقف عند الباب ممكن يساعدكو.
fīh fanni wāʾif ʿand il-bāb mumkin yisāʿidku.
There's a technician standing by the door who can help you.
تقصد الفني اللي لابس أزرق؟
tiʾṣud il-fanni lli lābis ʾazraʾ?
You mean the technician wearing blue?
The first two turns introduce nonspecific and then new indefinite people with zero. The final turn identifies an accessible technician and switches to الـ...اللي.
Register and variation
(mainstream Cairene, informal/neutral) integrated indefinite relatives normally have zero marking. (formal/MSA) formal Arabic has a parallel definiteness contrast but different morphology, agreement, and pronunciation. (regional/social) Alexandria, Delta, Upper Egyptian, Bedouin, class, age, and community varieties differ in how freely indefinite اللي occurs. (bilingual/contact speech) English influence can encourage overuse of اللي as a word-for-word that. (performance language) afterthought اللي is common in staged conversational narration because it dramatizes an added comment.
Common Mistakes
1. Translating English that with اللي after every indefinite.
❌ عايز تطبيق اللي يحسب المصاريف.
Incorrect in the neutral nonspecific reading — the clause follows directly.
✅ عايز تطبيق يحسب المصاريف الشهرية.
ʿāyiz taṭbīʾ yiḥsib il-maṣārīf ish-shahriyya.
I want an app that calculates monthly expenses.
2. Deleting the object suffix together with اللي.
❌ اشتريت كتاب قريت في المكتبة.
Incorrect for ‘a book I read’; zero linking does not remove object resumption.
✅ اشتريت كتاب قريته في المكتبة الأول.
ishtarēt kitāb ʾarētu fi l-maktaba l-ʾawwil.
I bought a book that I had first read at the library.
3. Stranding a preposition after an indefinite head.
❌ محتاج مكتب أشتغل على.
Incorrect — على requires a suffix referring to مكتب.
✅ محتاج مكتب أشتغل عليه من البيت.
miḥtāg maktab ʾashtaghal ʿalēh min il-bēt.
I need a desk I can work at from home.
4. Switching to formal demonstrative order once the referent is identified.
❌ هذه البنت اللي كلمتك مستنية.
Register mixture — everyday Cairo uses postnominal دي.
✅ البنت دي اللي كلمتك مستنياك بره.
il-bint di lli kallimitak mistannyāk barra.
This woman who called you is waiting for you outside.
Key Takeaways
- A neutral integrated relative after a bare indefinite noun normally has no اللي.
- Specificity does not equal definiteness: a speaker can have one particular new person in mind and still use zero.
- Object, possessive, and prepositional resumptive suffixes remain inside zero relatives.
- Marked indefinite اللي exists as contrastive or afterthought packaging, but it is not the default learner pattern.
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- اللي: The Core Relative MarkerB1 — Use invariant اللي after definite human and nonhuman antecedents, then mark the antecedent's role with a gap or resumptive clitic.
- Subject Relatives with الليB1 — Build subject relative clauses with an invariant linker, a subject gap, ordinary Cairene agreement, and independent tense and negation.
- Object Relatives and Resumptive CliticsB1 — Form Cairene object relatives by attaching a resumptive object clitic to the verb and matching it to the antecedent.
- Prepositional Relatives with ResumptionB1 — Keep an Egyptian preposition inside the relative clause and attach a suffix that resumes its antecedent.
- Definiteness and Relative-Clause ChoiceB1 — Choose between اللي and a zero relative marker by tracking whether an Egyptian Arabic antecedent is definite, indefinite, or generic.
- اللي or No Relative Marker?B1 — Choose اللي after a definite head and zero after an indefinite head, while preserving Egyptian resumptive pronouns and discourse distinctions.