-a

Learned borrowing from Latin -a (nominative second declension neuter plural suffix), plural counterpart to -um (nominative second declension neuter singular suffix).

Learned borrowing from Ancient Greek -α (-a, nominative second declension neuter plural suffix), plural counterpart to -ον (-on, nominative second declension neuter singular suffix).

Learned borrowing from Latin -a (nominative first declension neuter singular suffix)

Borrowed from Italian -a, Spanish -a, or Portuguese -a, all feminine noun suffixes from Latin -a.

Added especially for metrical reasons, or as an empty filler syllable.

Contraction of of.

Contraction of to.

Contraction of do.

A pronunciation spelling of -er, representing the unstressed schwa /ə/ in non-rhotic dialects.