To bemoan means to express sadness or disappointment about something, often by complaining about it repeatedly. When your friend bemoans how much homework she has, she's dwelling on how unfair or difficult it feels, bringing it up again and again. When a coach bemoans his team's mistakes after a tough loss, he's expressing deep disappointment about what went wrong.

The word suggests a kind of sorrowful complaining. You might bemoan a rainy day that ruins your plans for an outdoor party, or bemoan the fact that summer vacation is ending. Students often bemoan difficult assignments, while parents might bemoan messy rooms or forgotten chores.

There's usually something a bit excessive about bemoaning. It involves sustained lamentation, almost as if you're mourning a small loss. When you bemoan something, you're really lamenting it, dwelling on your disappointment. Someone who constantly bemoans their situation instead of trying to improve it can become tiresome to be around. The word captures that moment when disappointment turns into a persistent, spoken complaint, when you're actively and audibly regretting something unfortunate.