frustraneous

English edit

frustraneous (comparative more frustraneous, superlative most frustraneous)

(formal) Useless.
- 1688, Henry More, Divine Dialogues:
  Their attempts being so frustraneous, and the demonstrations to the contrary so perspicuous, it is a marvel that any man, virtuously and piously disposed, should be so partially and zealously affected in a cause that has neither truth nor any honest usefulness in it.