牢骚 (láo sāo): Complaint (Noun) — Meaning & Stroke Order

He has a lot of complaints today.

Instead of complaining privately, it's better to formally put forward your suggestions for improvement.

He did not voice any complaints despite the temporary setback.

When encountering difficulties at work, venting some grievances can relieve stress, but it's also important to actively solve problems.

While waiting for the subway, I overheard a few people nearby complaining about the weather.