IPA: /ˈtaɪərɪŋli/
KK: /ˈtaɪərɪŋli/
In a way that causes fatigue or exhaustion.
The lecture went on tiringly, making it hard for the students to stay focused.
Tiringly → It is formed from "tire" (from Old French *tirer*, meaning to pull or draw) and "-ingly" (a suffix used to form adverbs indicating manner). The word "tiringly" means in a manner that causes fatigue or exhaustion.
Think of the word 'tire' meaning to pull or draw energy away, and remember that 'tiringly' describes doing something in a way that causes fatigue.