-machcomb. form

Primary stress is retained by the usual stressed syllable of the preceding element and vowels may be reduced accordingly; see e.g.
monarchomach n.Origin: A borrowing from Greek. Etymon: Greek -μαχος.
Etymology: < ancient Greek -μαχος, combining form corresponding to μάχεσθαι to fight, μάχη battle, of unknown origin. In some instances via classical Latin -machus.First recorded in loans from Greek, as iconomach n. Formations are found from the 19th cent. Chiefly combined with first elements of Greek origin.
This is a new entry (OED Third Edition, March 2000; most recently modified version published online December 2018).