- -ade suffix denoting an action or product of an action, from L. -ata (Fr. -ade, Sp. -ada, It. -ata), fem. pp. ending used in forming nouns. A living prefix in French, from which many words have come into English (e.g. LEMONADE (Cf. lemonade)). Latin -atus, pp. suffix of verbs of the 1st conjugation also became -ade in French (Sp. -ado, It. -ato) and came to be used as a suffix denoting persons or groups participating in an action (e.g. BRIGADE (Cf. brigade), DESPERADO (Cf. desperado)).
Etymology dictionary. 2014.