English version

what (...) for?

From Longman Dictionary of Contemporary Englishwhat (...) for?what (...) for?a) REASONused to ask why someone does something ‘She’s decided to work part-time.’ ‘What for?’ What did you do that for? b) REASONused to ask what purpose or use something has What’s this gadget for? what
Examples from the Corpus
what (...) for?What's this tool for?