upright

1. 堂堂七尺男儿，站得端，立得正。

upright 直立的，挺直的

up,向上，right, 直的，词源同regulate, erect.

upright (adj.)

Old English upriht "erect, face-upward;" see up (adv.) + right (adj.1). Similar compounds are found in other Germanic languages (Old Frisian upriucht, Middle Dutch oprecht, Old High German ufreht, German aufrecht, Old Norse uprettr). Figurative sense of "good, honest, adhering to rectitude" is first attested 1520s.

As an adverb, Old English uprihte. As a noun, 1560s in the sense "a vertical front;" c. 1700 as "a vertical timber in framing;" 1742 in the sense "something standing erect." Meaning "an upright piano" is from 1860.

THREE-PENNY UPRIGHT. A retailer of love, who, for the sum mentioned, dispenses her favours standing against a wall. ["Dictionary of the Vulgar Tongue," 1811]

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The bent-over rear-entry posture they are talking about, of course, is kubda, the three-obol position at the bottom-end of a prostitute's price-range. [James N. Davidson, "Courtesans and Fishcakes: The Consuming Passions of Classical Athens," 1997]

1. He was sitting on an upright chair beside his bed, reading.

他正坐在床前一张直背椅上看书。

2. He was handsome, upright and chivalrous.

他长相英俊，为人正直，风度翩翩。

3. Cautiously, he moved himself into an upright position.

他小心翼翼地直起了身子。

4. Moira sat stiffly upright in her straight-backed chair.

莫伊拉直挺挺地坐在她的直背靠椅上。

5. With a swift movement, Matthew Jerrold sat upright.

马修·杰罗尔德迅速坐直了。

【upright, vertical, erect, perpendicular, plumb】
这组词都有“垂直的、竖式的”的意思，其区别是：
upright: 普通用词，指竖立、笔直而不是倾斜、倒塌的。
vertical: 指与平面、水平线或基线成直角或几乎成直角向上延伸至顶点的物体。也可指呈直线上升或下降的。
erect: 指笔直挺拔，而非倾斜、佝偻、弯曲或倒塌的。
perpendicular: 指与水平线形成90度的线或面，或朝垂直方面延伸的，尤指向下的急剧运动。
plumb: 建筑上用词，凭锤球评判某物是否完全垂直。