1560s, "moderate north or northeast wind," from Old Spanish briza "cold northeast wind;" in West Indies and Spanish Main, the sense shifting to "northeast trade wind," then "brisk, fresh wind from the sea." English sense of "gentle or light wind" is from 1620s. An alternative possibility is that the English word is from East Frisian brisen "to blow fresh and strong." The slang sense of "something easy" is American English, c. 1928.
adjective suffix, "full of or characterized by," from Old English -ig, from Proto-Germanic *-iga- (source also of Dutch, Danish, German -ig, Gothic -egs), from PIE -(i)ko-, adjectival suffix, cognate with elements in Greek -ikos, Latin -icus (see -ic). Originally added to nouns in Old English; used from 13c. with verbs, and by 15c. even with other adjectives (for example crispy).