-às

Inherited from Latin -āceus. Doublet of -aci, which was borrowed.

• IPA^(key): (Central, Balearic, Valencia) [ˈas]

-às m (noun-forming suffix, plural -assos, feminine -assa, feminine plural -asses)
-às (adjective-forming suffix, feminine -assa, masculine plural -assos, feminine plural -asses)

1. forms augmentatives of nouns and adjectives

From Latin -āvistis, combination of the first conjugation perfect infix -āv and the second person plural present perfect indicative ending -istis.

-às

1. Archaic, used to form the second person plural preterite indicative of first conjugation verbs up to XVI century

• This form fell out of use, being largely replaced by the analogical ending -àreu, or by the periphrastic past with vau or vàreu.