comp. suffix, forming adjs.; 1. f. L. -ārius, -a, -um ‘connected with, pertaining to’ + -OUS (as if ad. L. -āriōsus; cf. cariōsus, carious). The reg. Eng. repr. of -ārius is -ARY1; but the compound suffix is of occasional use, as in cibarious, gregarious, temerarious, vicarious, and as a by-form in arbitrarious, contrarious, etc. (Hilarious, f. L. hilari-s + -ous, seems to owe its form to association with this suffix.)
