nodto Acknowledge quietly Tacitly acknowledge Greet quietly Bob one's head at Acknowledge nonverbally Signal, perhaps Show silent approval of Recognize silently Give a nonverbal 'OK' Acknowledge, non-verbally Acknowledge without words Acknowledge without a word Acknowledge with a head movement With a ___ (recognizing) Acknowledge, in a way Give the O.K. Acknowledge silently Give the ___ (pick) Silently acknowledge Signal, in a way Signal agreement, in a way Greet silently Acknowledge tacitly Give the O.K Acknowledge with a head gesture