waver russian
дро́гнуть
shiver, be chilled, shake, quaver, move, waver, falter, flinch
колеба́ться
hesitate, vacillate, waver
колеба́ние
vibration, fluctuation, variation, hesitation, wavering, vacillation
заколеба́ться
begin to hesitate, become unsteady, begin to waver
ша́ткий
unsteady, shaky, rickety, precarious, wavering, weak
продро́гнуть
shiver, be chilled, shake, quaver, move, waver, falter, flinch