knotty Synonyms

knobbed knotted problematical snarled convoluted tough snarly involved tortuous baffling byzantine problematic gnarled gnarly tangled stressful sinuous sticky spiny sophisticated operose severe perplexed perplexing porism precarious prickly sensitive profound puzzling recondite rough rugged scabrous tangly taxing thorny bumpy knobbly messy multistage nodulated nubbly nubby tousled wurly rootbound unsmoothed backbreaking uphill