testy adj. + Add to list US //ˈtɛsti// UK //tˈɛsti// testy SynonymsEtymology Synonyms crankyfractiousirritablenettlesomepeckishpeevishpettishpetulantscratchytetchyOrigin Middle English testif (“headstrong”), from Old French testu, from teste (“head”) + -u. Compare modern French tête (“head”), têtu (“stubborn”).