spiny

requiring exceptional skill or caution in performance or handling this promises to be a spiny problem to negotiate Synonyms catchy, delicate, difficult, dodgy [chiefly British], hairy, knotty, nasty, prickly, problematic (also problematical), sensitive, tricky, sticky, thorny, ticklish, touchy, tough, tricksyRelated Words abstract, abstruse, complex, complicated, hard, intricate, involved, recondite, serious; problem, scabrous, stubborn, troublesome, troublous, vexatious, vexing, worrisome; burdensome, demanding, discommoding, exacting, exhausting, importunate, inconvenient, onerous, oppressive, painful, stressfulNear Antonyms easy, effortless, manageable, painless, simple, straightforward, uncomplicated, undemanding, unproblematic