退屈【たいくつ】
tedious, boring, dull, uninteresting, tiresome, monotonous, to feel bored, to get bored (with), to get tired (of)
理屈【りくつ】
theory, reason, logic, (unreasonable) argument, strained logic, excuse, pretext
屈辱【くつじょく】
disgrace, humiliation
窮屈【きゅうくつ】
narrow, tight, cramped, formal, stiff, strict, ceremonious, rigid, constrained, uncomfortable, tight (e.g. finances)
屈折【くっせつ】
bending, curving, twisting, turning, winding, warping (of feelings, logic, etc.), distortion, twisting, refraction, inflection
不屈【ふくつ】
persistence, fortitude, indomitability
屈指【くっし】
leading, foremost, preeminent, outstanding, one of the best
卑屈【ひくつ】
servile, subservient, obsequious, slavish, self-abasing, grovelling, spineless
屈託【くったく】
worry, care, concern, ennui, boredom
屈服【くっぷく】
yielding, submission, surrender, giving way, succumbing
屈する【くっする】
to yield, to give in, to be daunted, to shrink, to bend (knee, etc.), to subdue, to overpower, to feel down
屈強【くっきょう】
robust, brawny, muscular, strong, sturdy
屈伸【くっしん】
bending and stretching, flexing and extending