Definition
To behave or speak cautiously to avoid offending or upsetting anyone.
言行谨慎
We must tread carefully when discussing this sensitive topic.
在讨论这个敏感话题时，我们必须谨慎行事。
She knew she had to tread carefully on this issue to avoid upsetting anyone.
她知道在这个问题上必须小心行事，以避免让任何人不悦。
When dealing with new clients, they always tread gently.
在与新客户打交道时，他们总是谨慎行事。