Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
waver [ˈweɪvər] vi (voice) дро́гнуть (perf) (person, faith) колеба́ться*(поколеба́ться*perf)
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.
Русский: