angry adj.

mid-13c., "hostile attitude, ill will, surliness" (also "distress, suffering; anguish, agony," a sense now obsolete), from Old Norse angr "distress, grief, sorrow, affliction," from Proto-Germanic *angaz (from PIE root *angh- "tight, painfully constricted, painful"). It is cognate with German Angst. The sense of "rage, wrath" is attested by early 14c.

From the sense of oppression, or injury, the expression was transferred to the feelings of resentment naturally aroused in the mind of the person aggrieved. In the same way, the word harm signifies injury, damage in English, and resentment, anger, vexation in Swedish.

The idea of injury is very often expressed by the image of pressure, as in the word oppress, or the Fr. grever, to bear heavy on one. [Hensleigh Wedgwood, "A Dictionary of English Etymology," 1859 ]

Old Norse also had angr-gapi "rash, foolish person;" also angr-lauss "free from care;" angr-lyndi "sadness, low spirits."

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.