fu·tile
\ˈfyü-təl, ˈfyü-ˌtī(-ə)l\ adjective
[Middle French or Latin; Middle French, from Latin futilis brittle, pointless, probably from fu- (akin to fundere to pour)]
1: serving no useful purpose: completely ineffective (efforts to convince him were futile)
2: occupied with trifles: frivolous