Откуда

where ... from, from where; how

ɐ t k u d ə → откуда

от away, off; separation or removal + куда where (to)

adverb Rare #47,900

where ... from, from where; how In questions, can ask about the source or basis of something, often translated as “how.”

RU: Откуда ты это знаешь?

EN: How do you know that?

“Where did you get my phone number?” “Tom gave it to me.”

“Where did you get that scar?” “I don’t want to talk about it.”

“How did you get my phone number?” “Tom gave it to me.”

“How do you know sign language?”

— Форма голоса (2016)