Wordnet 3.0
ADVERB (1)
1. 
 in a witty manner; 
- Example: "he would wittily chime into our conversation"
The Collaborative International Dictionary of English v.0.48:
Wittily \Wit"ti*ly\, adv.
   In a witty manner; wisely; ingeniously; artfully; with wit;
   with a delicate turn or phrase, or with an ingenious
   association of ideas.
   [1913 Webster]
         Who his own harm so wittily contrives.   --Dryden.
   [1913 Webster]
WordNet (r) 3.0 (2006):
wittily
    adv 1: in a witty manner; "he would wittily chime into our
           conversation"