frustrating

Strongest match

opposing

Strong matches

averting, conservative, foiling, forestalling, preservative, preventive, thwarting

Weak matches

arresting, balking, checking, coping with, defending, guarding, in opposition, interrupting, protecting, resistive, safeguarding, uptight, warding off, withstanding

Strongest matches

depressing, disconcerting, discouraging, disheartening, distasteful, mediocre, unpleasant, unsatisfying

Strong matches

bitter, displeasing, failing, lame

Weak matches

disagreeable, falling short, inadequate, ineffective, inferior, insufficient, mid, unfulfilling, unhappy, uninteresting

Strongest matches

aggravating, annoying, exasperating, infuriating, troubling

Strong matches

provoking, riling, trying

Weak match

vexatious