تعقب

Verb

 * 1) to trace, to track down, to trail
 * 2) to look towards the consequence of, to consider a second time; to doubt; to repent

Etymology 2
of.

Noun

 * 1) following up, pondering
 * 2) finding fault with
 * 3) pursuing of a culprit
 * 1) pursuing of a culprit