This is the 173rd most frequent Ukrainian word.
чому
"Чому" means "why" in English.
'Чому' is used here as an interrogative adverb to form a question asking for a reason.
Чому ти запізнився на зустріч?
Why were you late for the meeting?
'Чому' functions here as a conjunction introducing a subordinate clause expressing causality.
Я не знаю, чому він так вчинив.
I don’t know why he acted that way.
'Чому' is used in this sentence to explain the rationale behind the preceding statement, serving as a conjuctive adverb.