الظاهر
هو اسمُ فاعل من (الظهور)، وهو اسمٌ ذاتي من أسماء الربِّ تبارك...
Not doing something despite of being able to do it, whether it be intentionally or unintentionally.
"Tark" (leaving/abandoning) is to stop oneself from doing an action which is required, such as refraining from performing the obligatory and supererogatory acts of worship which Allah enjoined. An example is "tark as-salāh" is not performing prayer.
"Tark": stopping to do something or turning away from it. Other meanings: giving something up, abandoning, quitting, rejecting, neglecting.
To abandon something and not to do it.