seedy adj.

Middle English sēd, from Old English sēd (Anglian), sæd (West Saxon), "that which may be sown; an individual grain of seed," from Proto-Germanic *sediz "seed" (source also of Old Norse sað, Old Saxon sad, Old Frisian sed, Middle Dutch saet, Old High German sat, German Saat). This is reconstructed to be from PIE *se-ti- "sowing," from root *sē- "to sow."

Figurative sense of "offspring, progeny, posterity," now rare or archaic except in biblical use, was in Old English; the figurative meaning "that from which anything springs, latent beginning" is by late Old English. From late 14c. as "act or time of sowing." The meaning "semen, male fecundating fluid," also now archaic or biblical, is from c. 1300. For the sporting sense (by 1924), see seed (v.).

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). Adjectives such as hugy, vasty are artificial words that exist for the sake of poetical metrics.