In Previous English only introducing unfavorable inquiries demanding an affirmative reply; in this kind of circumstances the word has from time to time alternatively been interpreted as an (adverbial) interrogative marker. Inside a immediate issue: for what explanation; from what bring about or motive; for what goal. Cf. wherefore adv. https://why-does-my-ear-keep-popp09765.ttblogs.com/15996228/ears-keep-popping-options