French word -aire comes from Latin -arius

Detailed word origin of -aire

Dictionary entry	Language	Definition
-arius	Latin (lat)	(masculine only) -er; Used to form nouns denoting an agent of use, such as a dealer or artisan, from other nouns. Used to form adjectives from nouns or numerals.
-aire	French (fra)	-ary (adjectival suffix). -ary (nominal suffix).

Words with the same origin as -aire