Covered with or made of wool; soft and fluffy, or vague and confused in thinking.
From Old English 'wull' meaning wool, plus the adjectival suffix '-y.' The metaphorical meaning (unclear thinking) developed because wool is thick and obscures sight.
Woolly mammoths were named for their woolly coats, which kept them warm during ice ages—and their DNA is so well preserved in frozen wool that scientists are actually trying to bring them back using modern genetics!
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