авось vs вдруг

avos' vs vdrug — perhaps, hopefully vs suddenly/in case

What it really means

Авось expresses hopeful, somewhat fatalistic reliance on luck: “maybe it will work out.” Вдруг means “suddenly” for an unexpected event, or “what if/in case” when raising a possibility. Авось usually evaluates a desired outcome; вдруг neutrally introduces an event or precautionary possibility.

Examples in natural speech

Авось повезёт в этот раз.
Maybe luck will be on our side this time.
Авось всё закончится хорошо.
Hopefully everything will end well.
Вдруг он уже приехал?
What if he has already arrived?
Вдруг погода испортится, возьми куртку.
In case the weather turns bad, take a jacket.
Вдруг свет погас.
Suddenly the light went out.

Common mistakes

Do not translate вдруг as “maybe” in every context: suddenness is its core meaning in past-event narration. Авось is not a neutral probability adverb and can suggest a risky hope or lack of planning.

Memory tip

Авось trusts luck; вдруг watches for an unexpected turn.

Frequently asked questions

Is авось formal?

No; it is familiar and expressive, often associated with a carefree or fatalistic attitude.

Does вдруг take a special case?

No: it introduces a normal clause; in precautionary sentences, the verb and case patterns remain those of the clause itself.

Can авось be used with a command?

Yes: позвони ему, авось поможет means “call him; perhaps he will help,” with an optimistic but uncertain implication.

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