workhorse
🇺🇸
/ˈwɜːrkhɔːrs/
🇬🇧
/ˈwɜːkhɔːs/
A reliable person or machine that consistently does hard or boring work.
The old tractor was the workhorse of the farm, always ready to plow the fields.
古いトラクターは農場の力馬であり、いつも畑を耕す準備ができていた。