Alas (interjection)

1. Used to express sadness, pity, or concern.
2. Used to indicate that something is surprising or unfortunate.

Origin:

Middle english: from old norse á leið "on the way", from á "on" + leið "way, path".

Examples:

1. Alas, I missed the concert.
2. Alas, the project was not successful.
3. Alas, he passed away.
4. Alas, the team lost the game.
5. Alas, the store was out of stock.