Origin and history of invision

c. 1300, visioun, "that which is seen," specifically "something seen in the imagination or in the supernatural" by one sleeping or waking; from Anglo-French visioun, Old French vision "presence, sight; view, look, appearance; dream, supernatural sight" (12c.), from Latin visionem (nominative visio) "act of seeing, sight, thing seen," noun of action from past-participle stem of videre "to see" (from PIE root *weid- "to see").

Also "a narrative account of a vision" (mid-14c.). By early 15c. as "a visual perception" (of something). The meanings "sense of sight, faculty that perceives by the eye;" also "act of seeing external objects" are recorded by late 15c.

In 20c. use, "distinct, vivid mental conception of a scheme or anticipation." The meaning "statesman-like foresight, political sagacity" is attested from 1926.

word-forming element meaning "not, opposite of, without" (also im-, il-, ir- by assimilation of -n- with following consonant, a tendency which began in later Latin), from Latin in- "not," cognate with Greek an-, Old English un-, all from PIE root *ne- "not."

In Old French and Middle English often en-, but most of these forms have not survived in Modern English, and the few that do (enemy, for instance) no longer are felt as negative. The rule of thumb in English has been to use in- with obviously Latin elements, un- with native or nativized ones.