Question

dull a.不鲜明的；迟钝的；v.变迟钝 dull (adj.) c.1200, "stupid;" early 13c., "blunt, not sharp;" rare before mid-14c., apparently from Old English dol "dull-witted, foolish," or an unrecorded parallel word, or from Middle Low German dul "slow-witted," both from Proto-Germanic *dulaz (cognates: Old Frisian and Old Saxon dol "foolish," Old High German tol, German toll "mad, wild," Gothic dwals "foolish"), from PIE *dheu- (1) "dust, vapor, smoke" (and related notions of "defective perception or wits"). Of color from early 15c.; of pain or other sensations from 1725. Sense of "boring" first recorded 1580s.dull. (8) Not exhilarating; not delightful; as to make dictionaries is dull work. [Johnson]Dullsville, slang for "town where nothing happens," attested from 1960.dull (v.) c.1200, "to grow weary, tire;" of pointed or edged things from c.1400; of the senses from 1550s; from dull (adj.). Related: Dulled; dulling. 【记】发音有点象 呆，和dumb音意接近

Accepted Answer

[dʌl] 【英】 adj. 不鲜明的(not bright);【考】 tarnish : dull / vitrify : smooth(使失去光泽结果是阴 暗的/使玻璃化结果是 光滑的)反义词：perspicuous (明白的); resplendent(光辉的) ; trenchant(锋利的)【例】 Watching television dulls one's wits. adj. 隐约的(不能强烈地感觉到); 钝的; 迟钝的 = insensitive; 颜色不鲜明的, 不明亮的; v 使迟钝; 使眼色不鲜明【类】tarnish: dull = vitrify: smooth使失去光泽结果是不明亮的 = 使玻璃化结果是光滑的【参】dullard(n 愚人; 笨蛋)【反】perspicuous(adj 明白的; 明瞭的); resplendent(adj 辉煌灿烂的); trenchant(adj 锋利的); brilliance(n 显赫; 光辉)－dullness; wit(n 机智的人)－dullard(n 愚人)

单词	dull
音标	[dʌl]
解释	a.不鲜明的；迟钝的；v.变迟钝
红宝书	【英】 adj. 不鲜明的(not bright); 【考】 tarnish : dull / vitrify : smooth(使失去光泽结果是阴暗的/使玻璃化结果是光滑的)反义词：perspicuous (明白的); resplendent(光辉的) ; trenchant(锋利的) 【例】 Watching television dulls one's wits.
字源	dull (adj.) c.1200, "stupid;" early 13c., "blunt, not sharp;" rare before mid-14c., apparently from Old English dol "dull-witted, foolish," or an unrecorded parallel word, or from Middle Low German dul "slow-witted," both from Proto-Germanic dulaz (cognates: Old Frisian and Old Saxon dol "foolish," Old High German tol, German toll "mad, wild," Gothic dwals "foolish"), from PIE dheu- (1) "dust, vapor, smoke" (and related notions of "defective perception or wits"). Of color from early 15c.; of pain or other sensations from 1725. Sense of "boring" first recorded 1580s. dull. (8) Not exhilarating; not delightful; as to make dictionaries is dull work. [Johnson] Dullsville, slang for "town where nothing happens," attested from 1960. dull (v.) c.1200, "to grow weary, tire;" of pointed or edged things from c.1400; of the senses from 1550s; from dull (adj.). Related: Dulled; dulling.
不择手段背单词	adj. 隐约的(不能强烈地感觉到); 钝的; 迟钝的 = insensitive; 颜色不鲜明的, 不明亮的; v 使迟钝; 使眼色不鲜明【类】tarnish: dull = vitrify: smooth使失去光泽结果是不明亮的 = 使玻璃化结果是光滑的【参】dullard(n 愚人; 笨蛋) 【反】perspicuous(adj 明白的; 明瞭的); resplendent(adj 辉煌灿烂的); trenchant(adj 锋利的); brilliance(n 显赫; 光辉)－dullness; wit(n 机智的人)－dullard(n 愚人)
趣味全助记	【记】发音有点象呆，和dumb音意接近

Dull German Adj C.1200 Early Dol Dʌl A.不鲜明的；迟钝的；V.变迟钝