IPA: /ˈwɜːr.lər/
KK: /ˈhwɪr.lɚ/
A person or thing that spins or rotates quickly.
The whirler at the amusement park made everyone dizzy with its fast movements.
Whirler → It is formed from "whirl" (of uncertain origin, possibly imitative of the sound of spinning) and "-er" (meaning a person who). A whirler is a person or thing that whirls or spins.
Think of someone or something that 'spins' — that's what a whirler does.