also Diesel, type of internal combustion engine, 1894, named for Rudolf Diesel (1858-1913), German mechanical engineer who designed this type of engine.
"cause (an engine) to run quickly," especially when not in gear, 1916, from earlier noun (1901), shortening of revolution, in reference to the internal combustion engine. Related: Revved; revving.
Latin interanea yielded Late Latin intrania, hence Italian entrango, Spanish entrañas, Old French entraigne; the alternative form that led to the Modern English word evidently is from influence of the Latin neuter plural (collective) adjective suffix -alia (French -aille).
scientific word-forming element meaning "gland," from Greek adēn "gland," probably from a suffixed form of PIE root *engw- "groin; internal organ" (source also of Latin inguen "groin;" see inguinal).
"waste gas," 1848, originally from steam engines, from exhaust (v.). In reference to internal combustion engines by 1896. Exhaust pipe, which carries away waste gas or steam from an engine, is by 1849.
1680s, from French inguinal (16c.) or directly from Latin inguinalis "of the groin," from inguen (genitive inguinis) "groin," from PIE *engw- "groin; internal organ" (which is perhaps also the source of Greek adēn "gland"). Related: Inguinally.
