- having or full of knots: a knotty board
- hard to solve or explain; puzzling: a knotty problem
Origin of knottyMiddle English
- Tied or snarled in knots.
- Covered with knots or knobs; gnarled.
- Difficult to understand or solve: “[The columnist] supplies funny, wise responses to knotty ethical dilemmas posed by readers” ( David Pogue )
(comparative knottier or more knotty, superlative knottiest or most knotty)
knot + -y