assiduous

adj. 刻苦的，勤勉的

中文词源

assiduous 勤勉的

前缀as- 同ad-. 词根sid, 坐，同sess, -ss, 过去分词格。坐得住冷板凳的，勤勉的。

assiduous: assiduous: see assess
assiduous (adj.): 1530s, from Latin assiduus "attending; continually present, incessant; busy; constant," from assidere "to sit down to" (thus "be constantly occupied" at one's work); from ad "to" (see ad-) + sedere "to sit" (see sedentary). The word acquired a taint of "servility" in 18c. Related: Assiduously; assiduousness.

1. as- "to" + sidu- (sid- => sidu-) + -ous.2. => "sit down to," thus "constantly occupied" at one's work.3. as，s 双写，一再的坐 = hard, arduous, diligent.

1. Podulski had been assiduous in learning his adopted language.: 波多斯基一直很努力地学习外语。