click

As I turned the key, the lock gave a click and the door opened.

tsk is a click in English.

The dirty secret of the internet is that all this distraction and interruption is immensely profitable. Web companies like to boast about[…]and so on. But the real way to build a successful online business is to be better than your rivals at undermining people's control of their own attention. Partly, this is a result of how online advertising has traditionally worked: advertisers pay for clicks, and a click is a click, however it's obtained.

A wheel, with teeth in which a click or pawl engages to prevent backward motion; or the same with addition of another click through which power is imparted at intervals to move the wheel.