10 letters · 10 points in Scrabble
noun the psychological state of being irritated or annoyed
noun a sudden outburst of anger
noun (pathology) abnormal sensitivity to stimulation
originBorrowed from Middle French irritation, from Latin irrītātiō, from irrītāre (“to excite”). By surface analysis, irritate + -ion.
Etymology from Wiktionary, CC BY-SA 3.0