трепкам означава в английски

flicker [flickered, flickering, flickers]▼(to keep going on and off)
verb
[UK: ˈflɪkə(r)] [US: ˈflɪkər]

waver [wavered, wavering, wavers]▼(to flicker, glimmer, quiver)
verb
[UK: ˈweɪ.və(r)] [US: ˈweɪ.vər]