Common mistakes
The root begins with و. In the present it drops out entirely: وَصَلَ becomes يَصِلُ, and the imperative is simply صِلْ.
يَوْصِفُ → يَصِفُ Present: heأَوْصِفُ → أَصِفُ Present: Iيَوْصِفُونَ → يَصِفُونَ Present: they (m.)تَوْصِفِينَ → تَصِفِينَ Present: you (f.)