كي لا / لئلا

So That Not

Level 4

كي لا (kay lā) and لئلا (li-’allā) both mean 'so that not' or 'in order not to.' They are used to explain the reason for avoiding a specific outcome.

How It Works

In Modern Standard Arabic, expressing why you are doing something to avoid a result requires specific negative purpose particles.

1. لئلا (li-’allā)
This is a fusion of three parts: the preposition لِـ (for), the conjunction أَنْ (that), and the negative لا (not). In writing, the ن of أَنْ is assimilated into the ل of the negative particle (a process called idghām), which is why you often see a shadda on the second lām (لئلّا). The hamza sits on a ي seat (ئ) because of the preceding 'i' sound. It is highly formal and literary, often translated as 'lest.'

2. كي لا (kay lā) / لكي لا (li-kay lā)
This is the most common way to say 'so that not' in modern prose and news. It functions identically to لكي but adds the negative particle. While it is usually written as two words, it is also frequently written as a single joined word: كيلا. In classical grammar, it is often posited that an 'implicit an' follows كي to trigger the mood change, though many modern approaches treat 'kay' itself as the direct trigger.

3. Grammatical Effect
Both patterns trigger the المضارع المنصوب (the subjunctive mood). For most singular verbs, the final vowel changes from a damma (-u) to a fatha (-a). For plural verbs, the final ن is usually dropped (see حذف النون في المنصوب والمجزوم).

Examples (4)

  1. تجنبْ المزاحَ الثقيلَ لئلا تسيءَ إلى أصدقائك.

    Avoid heavy joking so as not to offend your friends.

    Word by Word: Avoid the joking the heavy lest you offend to your friends.

    Here, 'li-’allā' is used in a formal advice context. Note the verb 'tusī’a' ends in a fatḥa (subjunctive).

  2. أغلقَ التاجرُ دكانَه مبكراً كي لا يواجهَ الزحام.

    The merchant closed his shop early so that he would not face the traffic.

    Word by Word: Closed the merchant his shop early so that not he faces the crowding.

    This uses 'kay lā,' which is standard for narrative prose. The verb 'yuwājiha' is in the subjunctive.

  3. ادرس جيداً لئلا تفشلَ في الامتحان.

    Study well lest you fail the exam.

    Word by Word: Study well so that not you fail in the exam.

    A classic example of negative purpose. 'Li-’allā' emphasizes the avoidance of failure.

  4. يتحدثون بهدوء لكي لا يوقظوا الطفل.

    They speak quietly so as not to wake the child.

    Word by Word: They speak with quietness so that not they wake the child.

    In this plural example, the verb 'yūqiẓū' has dropped its final 'nūn' because of the subjunctive mood triggered by 'li-kay lā'.

Common Mistakes

  • Using the indicative mood (ending in -u) instead of the subjunctive (ending in -a).

    أسرعُ لئلا أتأخرُ.
    أسرعُ لئلا أتأخرَ.

    After 'li-’allā' or 'kay lā', the verb must be 'manṣūb' (subjunctive). The final vowel must be a fatḥa.

  • Writing 'li-’allā' as separate words like 'li-an lā'.

    لأن لا ننسى
    لئلا ننسى

    In standard Arabic spelling, the components of 'li-’allā' are normally written as a single word.

How It Connects

Tap a pattern to see what it builds on and what it leads to.

كي لا / لئلاLevel 4So That Not

Learn This First

To understand 'so that not' (كي لا / لئلا), you first need to know how to express purpose using 'so that' (لكي). Since these particles trigger the subjunctive mood, you must be familiar with the present subjunctive (المضارع المنصوب) verb endings. Additionally, you should understand basic negation of the present tense using 'لا'.

Words in This Pattern

لئلاكي