The Collaborative International Dictionary of English v.0.48:
Basely \Base"ly\, adv. 1. In a base manner; with despicable meanness; dishonorably; shamefully. [1913 Webster] 2. Illegitimately; in bastardy. [Archaic] --Knolles. [1913 Webster]WordNet (r) 3.0 (2006):
basely adv 1: in a despicable, ignoble manner; "this new leader meanly threatens the deepest values of our society" [syn: meanly, scurvily, basely]