covertly

from WordNet (r) 3.0 (2006)
covertly
    adv 1: in a covert manner; "he did it covertly" [ant: {overtly}]
    
from The Collaborative International Dictionary of English v.0.48
Covertly \Cov"ert*ly\, adv.
   Secretly; in private; insidiously.
   [1913 Webster]
    

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