Я хочу побыть один.

I want to stay alone for a while.

Breakdown of Я хочу побыть один.

• я: I
• хотеть: to want
• один: alone
• побыть: to stay for a while

Questions & Answers about Я хочу побыть один.

Why is it побыть and not just быть?

Побыть is the perfective form related to быть.

• быть = to be
• побыть = to be / stay for a while, for some limited time

So Я хочу побыть один does not just mean I want to be alone in a general sense. It suggests:

• I want to be alone for a bit
• I want some time alone
• I want to spend a little time alone

That small difference is very natural in Russian.

What does the prefix по- add here?

In побыть, the prefix по- often gives the idea of doing something for a short time or for a while.

Compare:

• быть одному = to be alone
• побыть одному = to be alone for a while

This use of по- is very common with verbs when the speaker wants to express a limited duration:

• посидеть = sit for a while
• подождать = wait for a bit
• поговорить = talk for a while

So побыть sounds more natural than быть in a sentence about a temporary wish.

Why is it один? Doesn’t that usually mean one?