early 13c., "rough, jagged" (figurative); 1570s, of landscape, "rough, rugged, stumpy;" 1610s, of persons, "gaunt and wasted, lean, thin, bony;" see scrag + -y (2), and compare scroggy, scraggly. In Scottish, scranky. Related: Scragginess.
1540s, "lean person or animal, a raw-bones;" perhaps from a Scandinavian source (compare Norwegian skragg "a lean person;" dialectal Swedish skraka "a great, dry tree; a long, lean man," skragge "old and torn thing," Danish skrog "hull of a ship, carcass," Icelandic skröggr, a nickname of the fox); perhaps from root of shrink.
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).