with great caution

极为小心地

Caution is the parent of safety.

小心驶得万年船。

give sb a caution

告诫某人

Just a word of caution— these glasses are very delicate so handle them with care.

提醒一句，这些玻璃杯很容易打碎，所以要小心放置。

A friend cautioned her against / about taking risks.

朋友警告她不要冒险。

She cautioned Tom not to drive too fast.

她提醒汤姆开车不要太快。