Words that come from Old French -os

400 words across 12 languages descend from Old French -os — including vigorous, vigorously, pretentious, unpretentious, calamitous, mendacious, pretentiousness, merveilleux.

See the etymology of -os itself →

French (290)

Ido (43)

English (38)

Danish (6)

Italian (5)

Esperanto (4)

Middle French (3)

Russian (3)

Swedish (3)

Dutch (2)

Greek (2)

Hungarian (1)