英语词源字典 - 在线词源网站

back-stitch (n.)[back-stitch 词源字典]: 1610s, from back (adj.) + stitch (n.).[back-stitch etymology, back-stitch origin, 英语词源]
lock-step (n.): 1802, in military writing, for a very tight style of mass marching, from lock (n.) + step (n.).
Lock-step. A mode of marching by a body of men going one after another as closely as possible, in which the leg of each moves at the same time with and closely follows the corresponding leg of the person directly before him. [Thomas Wilhelm, "Military Dictionary and Gazetteer," Philadelphia, 1881]
Figurative use by 1836.
look-see (n.): "inspection," 1865, "Pidgin-like formation" [OED], and first used in representations of English as spoken by Chinese, from look (v.) + see (v.).
quick-step (n.): 1802, from quick (adj.) + step (n.). From 1906 as a verb. Related: quick-stepped; quick-stepping.
rock-salt (n.): 1707, from rock (n.1) + salt (n.).