godan verb (-ku), intransitive verb
Describes trembling or shivering, often from fear, cold, or strong emotion. A somewhat literary or expressive word; in everyday speech, 震える (ふるえる) is more common.
恐怖で全身がわななくのを感じた。
I felt my whole body tremble with fear.
寒さで唇がわなないていた。
My lips were shivering from the cold.