Adjective

• S: (adj) baffling, elusive, knotty, problematic, problematical, tough (making great mental demands; hard to comprehend or solve or believe) "a baffling problem"; "I faced the knotty problem of what to have for breakfast"; "a problematic situation at home"
• S: (adj) gnarled, gnarly, knotted, knotty, knobbed (used of old persons or old trees; covered with knobs or knots) "gnarled and knotted hands"; "a knobbed stick"
• S: (adj) Byzantine, convoluted, involved, knotty, tangled, tortuous (highly complex or intricate and occasionally devious) "the Byzantine tax structure"; "Byzantine methods for holding on to his chairmanship"; "convoluted legal language"; "convoluted reasoning"; "the plot was too involved"; "a knotty problem"; "got his way by labyrinthine maneuvering"; "Oh, what a tangled web we weave"- Sir Walter Scott; "tortuous legal procedures"; "tortuous negotiations lasting for months"
• S: (adj) knotty, snarled, snarly (tangled in knots or snarls) "a mass of knotted string"; "snarled thread"