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1.
making great mental demands; hard to comprehend or solve or believe
I faced the knotty problem of what to have for breakfast
2.
used of old persons or old trees; covered with knobs or knots
3.
highly complex or intricate
a knotty problem
4.
tangled in knots or snarls
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derived forms
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1. Knotty / Comparitive
knottier
2. Knotty / Superlative
knottiest
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