tes ‧ ty /ˈtesti/ BrE AmE adjective
[ Date: 1300-1400 ; Language: Anglo-French ; Origin: testif 'determined to do what you want' , from Old French teste 'head' ]
impatient and easily annoyed SYN irritable :
testy remarks
It had been a long day, and Sarah was getting a little testy.
—testily adverb
—testiness noun [uncountable]