observantly

from WordNet (r) 3.0 (2006)
observantly
    adv 1: in an observant manner [syn: {observantly},
           {observingly}]
    
from The Collaborative International Dictionary of English v.0.48
Observantly \Ob*serv"ant*ly\, adv.
   In an observant manner.
   [1913 Webster]
    

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