lispingly

from WordNet (r) 3.0 (2006)
lispingly
    adv 1: with a lisp; "she spoke lispingly"
    
from The Collaborative International Dictionary of English v.0.48
Lispingly \Lisp"ing*ly\, adv.
   With a lisp; in a lisping manner.
   [1913 Webster]
    

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