would it kill someone

Meaning

would it kill someone

(rhetorical question) Indicates the speaker is annoyed that someone is not doing something they should do.
Would it kill you to pay more attention in lectures?

Source: en.wiktionary.org

Words in the phrase

Close letter words and terms

would give the world to would have liked to would it hurt would just as soon would like would lose one's head if it wasn't screwed on