also: エンジン
Rare, dated compound; modern Japanese almost always uses エンジン alone. The full form エンジン発動機 may appear in older technical texts.
The notation 'エンジン発動機' can be seen in old technical books.
A rare compound spelling; the word is normally written as エンジン alone.
Standard modern spelling for 'engine'.
Compound of the loanword エンジン (engine) and 発動機 (はつどうき, 'motor'). The exact origin is uncertain, but it likely arose as a clarifying term in early technical writing.