"mass of flour or meal moistened and mixed for baking," Middle English dogh, from Old English dag "dough," from Proto-Germanic *daigaz "something kneaded" (source also of Old Norse deig, Swedish deg, Middle Dutch deech, Dutch deeg, Old High German teic, German Teig, Gothic daigs "dough"), from PIE root *dheigh- "to form, build." Meaning "money" is from 1851 (compare bread (n.)).
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/doughy">Etymology of doughy by etymonline</a>
Harper, D. (n.d.). Etymology of doughy. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/doughy