This is the 9th most frequent Russian word.
как
The Russian word "как" means "how" or "like/as" in English.
In this sentence, 'как' translates to 'how' and is used to inquire about someone's well-being.
Как вы поживаете?
How are you doing?
Here, 'как' means 'like' and is used to compare her singing to that of a nightingale.
Она поет как соловей.
She sings like a nightingale.
In this sentence, 'как' is part of the phrase 'как только,' meaning 'as soon as,' marking the beginning of an action.