obtuse

英[?b'tju?s] 美

反義詞acute

名詞:?obtuseness;

1. Obtuse：我不會吐絲，而別的蠶都吐——笨的、鈍角的
2. 這也是為什么 obtuse angle，obtuse triangle 被翻譯為鈍角和鈍角三角形的原因。

obtuse 遲鈍的，愚蠢的

來自obtund,使遲鈍，-s,過去分詞后綴。引申詞義遲鈍的，愚蠢的。

obtuse: obtuse: [16] The etymological meaning of obtuse is ‘beaten down, blunted’. It comes from Latin obtūsus, the past participle of obtundere, a compound verb formed from the prefix ob- ‘against’ and tundere ‘beat’ (source of English contusion and related to toil). The notion of being ‘dulled’ or ‘blunted’ led to its being used for ‘having dulled wits, stupid’, and the idea of bluntness also lies behind its geometrical use for an angle of more than 90 degrees (as contrasted with the ‘sharp’ acute angle).
=> contusion, toil
obtuse (adj.): early 15c., "dull, blunted," from Middle French obtus (fem. obtuse), from Latin obtusus "blunted, dull," also used figuratively, past participle of obtundere "to beat against, make dull," from ob "against" (see ob-) + tundere "to beat," from PIE *(s)tud-e- "to beat, strike, push, thrust," from root *(s)teu- "to push, stick, knock, beat" (cognates: Latin tudes "hammer," Sanskrit tudati "he thrusts"). Sense of "stupid" is first found c. 1500. Related: Obtusely; obtuseness.

1. I'm a limited and obtuse clergyman while you're the expert.: 你是專家，而我是個能力有限的愚笨牧師。

4. Two opposite corners of this rhomb contain three obtuse angles of 101°95'.: 菱面體的兩個對頂包含著三個101°95'的鈍角。