"onion like bulbous plant allied to the leek, known to the ancients and much used in cookery," Middle English garlek, from Old English garlec (West Saxon), garleac (Mercian), "garlic," from gar "spear" (in reference to the clove), see gar, + leac "leek" (see leek). Garlic-bread is attested by 1947.
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).
<a href="https://www.etymonline.com/word/garlicky">Etymology of garlicky by etymonline</a>
Harper, D. (n.d.). Etymology of garlicky. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/garlicky