IPA: /ˈroʊtəˌtɪlər/
KK: /ˈroʊtəˌtɪlər/
A machine used in gardening and farming that has rotating blades to break up and turn over the soil.
The farmer used a rototiller to prepare the garden bed for planting.
Rototiller → The word is formed from "rota" (from Latin, meaning wheel) and "tiller" (from Old English "tilian", meaning to prepare or cultivate). A rototiller is a machine that uses wheels to prepare the soil for planting by cultivating it.
Think of a 'wheel' ('rota') that helps 'prepare' ('tilian') the soil for planting — that's what a rototiller does.
No commonly confused words.