-atorsuffix
Primary stress is retained by the usual stressed syllable of the preceding element and vowels may be reduced accordingly; see e.g.
sonicator n.Origin: A borrowing from Latin. Etymon: Latin -ātor.
Etymology: < classical Latin -ātor, suffix forming agent nouns < -āt- , past participial stem of verbs in -āre (compare -ate suffix3) + -or -or suffix: see further discussion in the etymological note at -or suffix.Compare French -ateur, Italian -atore, Spanish -ador, Portuguese -adouro.
This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2022).