engorge (v.)

word-forming element meaning "in; into," from French and Old French en-, from Latin in- "in, into" (from PIE root *en "in"). Typically assimilated before -p-, -b-, -m-, -l-, and -r-. Latin in- became en- in French, Spanish, Portuguese, but remained in- in Italian.

Also used with native and imported elements to form verbs from nouns and adjectives, with a sense "put in or on" (encircle), also "cause to be, make into" (endear), and used as an intensive (enclose). Spelling variants in French that were brought over into Middle English account for parallels such as ensure/insure, and most en- words in English had at one time or another a variant in in-, and vice versa.

mid-14c., "throat," from Old French gorge "throat; a narrow passage" (12c.), from Late Latin gurges "gullet, throat, jaws," also "gulf, whirlpool," which probably is related to Latin gurgulio "gullet, windpipe," from a reduplicated form of PIE root *gwora- "food, devouring." Transferred sense of "deep, narrow valley" was in Old French. From 1520s as "what has been swallowed," hence in figurative phrases indicating nauseating disgust.

"act of swallowing greedily;" in pathology, "state of being filled to excess," 1610s, from engorge + -ment or else from French engorgement.