frustrating Synonyms

frustrative discouraging thwarting mosquito maddening lifeless irritative disillusioning irritate irksome insipid infuriate impeding humdrum mundane restricting unfulfilling soul-destroying mind-numbing uneventful trying tiresome tiring tired thwart tedious stodgy stale hindering fuddling exasperating defeat defeating characterless boring block bland balking balk baffling annoy annoying detaining deterring disappointing frustration frustrated forestalling foil foiling