wieldy (adj.)

Old English weldan (Mercian), wieldan, wealdan (West Saxon) "have power over, compel, tame, subdue" (class VII strong verb; past tense weold, past participle gewealden), merged with weak verb wyldan, both from Proto-Germanic *waldan "to rule" (source also of Old Saxon and Gothic waldan, Old Frisian walda "to govern, rule," Old Norse valda "to rule, wield, to cause," Old High German waltan, German walten "to rule, govern").

The Germanic words and cognates in Balto-Slavic (Old Church Slavonic vlado "to rule," vlasti "power," Russian vladeti "to reign, rule, possess, make use of," Lithuanian veldu, veldėti "to rule, possess") probably are from PIE *woldh-, extended form of root *wal- "to be strong, to rule." Related: Wielded; wielding.

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.