The Collaborative International Dictionary of English v.0.48:
Inconveniently \In`con*ven"ient*ly\, adv. In an inconvenient manner; incommodiously; unsuitably; unseasonably. [1913 Webster]WordNet (r) 3.0 (2006):
inconveniently adv 1: in an inconvenient manner; "he arrived at an inconveniently late hour" [ant: conveniently, handily]