Definition
To behave or speak cautiously to avoid offending or upsetting anyone.
言行謹慎
We must tread carefully when discussing this sensitive topic.
在討論這個敏感話題時，我們必須謹慎行事。
She knew she had to tread carefully on this issue to avoid upsetting anyone.
她知道在這個問題上必須小心行事，以避免讓任何人不悅。
When dealing with new clients, they always tread gently.
在與新客戶打交道時，他們總是謹慎行事。