Not influential.

Roget 172: inert, inactive, passive; torpid etc. 683; sluggish, dull, heavy, flat, slack, tame, slow, blunt; unreactive; lifeless, dead, uninfluential^†.    latent, dormant, smoldering, unexerted^†.    ... show more

Roget 175a: uninfluential^†, ineffective; inconsequential, nugatory; unconducing, unconducive, unconducting to^†; powerless etc. 158; irrelevant etc. 10.