Nahy prohibits an addressee from doing something. It contrasts with a positive command.
Word / formMeaning / explanation
لَا تَضْرِبْdo not strike!
لَا تَكْتُبْdo not write!
لَا تَجْلِسْdo not sit!
Here لَا is prohibitive, and the verb may display the jussive form. Not every occurrence of lā expresses a prohibition; in other contexts it can simply negate a statement.
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Introduction to ʿIlm al-Ṣarf and Basic Terminology
Nahy prohibits an addressee from doing something. It contrasts with a positive command.
Word / formMeaning / explanation
لَا تَضْرِبْdo not strike!
لَا تَكْتُبْdo not write!
لَا تَجْلِسْdo not sit!
Here لَا is prohibitive, and the verb may display the jussive form. Not every occurrence of lā expresses a prohibition; in other contexts it can simply negate a statement.