In·con·spic·u·ous a.  Not conspicuous or noticeable; hardly discernible. -- In*con*spic*u*ous*ly, adv. -- In*con*spic*u*ous*ness, n.
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  inconspicuously
       adv : in a manner intended to avoid attracting attention; "he had
             entered the room inconspicuously" [ant: conspicuously]