grindstone

mastery
UK /ˈɡɹaɪn(d)ˌstəʊn/ US /ˈɡɹaɪn(d)ˌstoʊn/noun

card 1 of 1 · idiom meaning

What does the idiom 'nose to the grindstone' mean?

What does the idiom 'nose to the grindstone' mean?