The second-person imperative is related to the jussive stem, but differs in its prefix and starting pronunciation. A prohibition uses prohibitive lā plus a second-person jussive.
VerbCommandProhibition
قَالَ يَقُولُقُلْلَا تَقُلْ
بَاعَ يَبِيعُبِعْلَا تَبِعْ
رَمَى يَرْمِياِرْمِلَا تَرْمِ
وَقَى يَقِيقِلَا تَقِ
Neither the shortened command nor its prohibition creates a new lexical root.
Opening interactive controls...
Advanced Sarf Application: Ambiguous Forms, Weak-Letter Reasoning and Error Correction
The second-person imperative is related to the jussive stem, but differs in its prefix and starting pronunciation. A prohibition uses prohibitive lā plus a second-person jussive.
VerbCommandProhibition
قَالَ يَقُولُقُلْلَا تَقُلْ
بَاعَ يَبِيعُبِعْلَا تَبِعْ
رَمَى يَرْمِياِرْمِلَا تَرْمِ
وَقَى يَقِيقِلَا تَقِ
Neither the shortened command nor its prohibition creates a new lexical root.