IPA: /ˈtɛstɪli/
KK: /ˈtɛstɪli/
In a way that shows irritation or annoyance.
She responded testily when asked about her plans.
Testily → It is formed from "testy" (from Middle English *testy*, meaning irritable or easily provoked) and the suffix "-ly" (meaning in a manner of). The word "testily" means in an irritable or easily provoked manner.
Think of someone being 'irritable' ('testy') and acting 'in that manner' ('-ly'). This helps you remember that 'testily' describes someone acting in an irritable way.