knottiest

1. making great mental demands; hard to comprehend or solve or believeExamples: "a baffling problem"; "I faced the knotty problem of what to have for breakfast"; "a problematic situation at home"Synonyms: baffling, elusive, knotty, problematic, problematical, tough

2. used of old persons or old trees; covered with knobs or knotsExamples: "gnarled and knotted hands"; "a knobbed stick"Synonyms: gnarled, gnarly, knobbed, knotted, knotty

3. highly complex or intricate and occasionally devious; ; ; ; ; ; ; ; - Sir Walter ScottExamples: "the Byzantine tax structure"; "Byzantine methods for holding on to his chairmanship"; "convoluted legal language"Synonyms: Byzantine, convoluted, involved, knotty, tangled, tortuous

4. tangled in knots or snarlsExamples: "a mass of knotted string"; "snarled thread"Synonyms: knotty, snarled, snarly