plural of -um / plural of -on

Marks singular nouns, with a foundation in Greek or Latin, often implying femininity, especially when contrasted with words terminating in -us.

Changes an element or substance into an oxide.

Marks nouns, with a foundation in Italian, Spanish, or Portuguese, implying femininity.

Added for metrical reasons to songs, poetry and verse, or as an empty filler syllable to other speech.

(idiomatic, UK) So common as to be practically worthless.

(colloquial, idiomatic) Used with a comparative to express extreme heat or cold.

(US, idiomatic) So common as to be practically worthless.

(idiomatic, US, euphemistic) Of an item of merchandise, to come into a person's possession without having been paid for; to be acquired illegally; to have been stolen.

(idiomatic, Britain, euphemistic) Of an item of merchandise, to come into a person's possession without having been paid for; to have been acquired illegally.