late 14c., "not affected by emotion or excitement," from un- (1) "not" + past participle of move (v.). Meaning "fixed in position" is from mid-15c.
Entries linking to unmoved
un- 1
prefix of negation, Old English un-, from Proto-Germanic *un- (source also of Old Saxon, Old Frisian, Old High German, German un-, Gothic un-, Dutch on-), from PIE *n- (source of Sanskrit a-, an- "not," Greek a-, an-, Old Irish an-, Latin in-), combining form of PIE root *ne- "not." Often euphemistic (such as untruth for "lie").
The most prolific of English prefixes, freely and widely used in Old English, where it forms more than 1,000 compounds. It underwent a mass extinction in early Middle English, but emerged with renewed vigor 16c. to form compounds with native and imported words. It disputes with Latin-derived cognate in- (1) the right to form the negation of certain words (indigestable/undigestable, etc.), and though both might be deployed in cooperation to indicate shades of meaning (unfamous/infamous), typically they are not.
It also makes words from phrases (such as uncalled-for, c. 1600; undreamed-of, 1630s; uncome-at-able, 1690s; unputdownable, 1947, of a book; un-in-one-breath-utterable, Ben Jonson; etc., but the habit is not restricted to un-; such as put-up-able-with, 1812). As a prefix in telegramese to replace not and save the cost of a word, it is attested by 1936.
move v.
late 13c., meven, in various senses (see below), from Anglo-French mover, Old French movoir "to move, get moving, set out; set in motion; introduce" (Modern French mouvoir), from Latin movere "move, set in motion; remove; disturb" (past participle motus, frequentative motare), from PIE root *meue- "to push away."
Of the physical meanings, the earliest in English (late 13c.) is the intransitive one of "change one's place or posture, stir, shift; move the body; move from one's place, change position. That of "to go (from one place to another), journey, travel; set out, proceed" is from c. 1300. The transitive sense of "cause to change place or position; shift; dislodge; set in motion" is from late 14c., as is that of "impart motion to, impel; set or sustain in motion." The intransitive sense of "pass from place to place; journey; travel; change position continuously or occasionally" is from c. 1300.
The emotional, figurative, and non-material senses also are mostly from Middle English: The earliest is "excite to action; influence; induce; incite; arouse; awaken" the senses or mental faculties or emotions (late 13c.); specifically "affect (someone) emotionally, rouse to pity or tenderness" by early 14c. Hence also "influence (someone, to do something), guide, prompt or impel toward some action" (late 14c.).
The sense of "propose; bring forward; offer formally; submit," as a motion for consideration by a deliberative assembly" is by early 15c. Sense of "to change one's place of residence" is from 1707. In chess, checkers, and similar games, "to change the position of a piece in the course of play," late 15c. Commercial sense of "sell, cause to be sold" is by 1900.
The policeman's order to move on is attested by 1831. To move heaven and earth "make extraordinary efforts" is by 1798. Related: Moved;moving.