В коридоре стоит какой-то стул.

in

Breakdown of В коридоре стоит какой-то стул.

• стоять: to stand
• стул: the chair
• коридор: the corridor

Questions & Answers about В коридоре стоит какой-то стул.

What is the function and nuance of какой-то in this sentence?

Какой-то is an indefinite pronoun/adjective often translated as “some (kind of)” or “some (unspecified)”.

Nuances:

• It shows that the speaker does not know or doesn’t care to specify which chair it is.
• It can sound a bit vague or dismissive, like “some random chair” / “some weird chair”.
• It’s stronger than just saying “a chair”; there is a hint of uncertainty, surprise, or mild annoyance.

Compare:

• В коридоре стоит стул. – There is a chair in the corridor. (neutral, just stating a fact)
• В коридоре стоит какой-то стул. – There’s some (odd / random / unknown) chair in the corridor.

How is какой-то different from какой-нибудь?