inescapable adj.

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.

c. 1300, transitive and intransitive, "free oneself from confinement; extricate oneself from trouble; get away safely by flight (from battle, an enemy, etc.)," from Old North French escaper, Old French eschaper (12c., Modern French échapper), from Vulgar Latin *excappare, literally "get out of one's cape, leave a pursuer with just one's cape," from Latin ex- "out of" (see ex-) + Late Latin cappa "mantle" (see cap (n.)). Mid-14c., of things, "get or keep out of a person's grasp, elude (notice, perception, attention, etc.);" late 14c. as "avoid experiencing or suffering (something), avoid physical contact with; avoid (a consequence)." Formerly sometimes partly Englished as outscape (c. 1500). Related: Escaped; escaping.