be careful not to (do something)

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be careful not to (do something)

Proceed cautiously, in an attempt to avoid potential problems or pitfalls. This phrase is often said as a warning or instruction. I was careful not to make any noise as I crept into the house after curfew. As you plan your talk, be careful not to bore the audience with scientific terms they won't understand. This plate is very hot—be careful not to burn yourself.
See also: careful, not
References in classic literature ?
We must be careful not to confuse the physical and the moral.
So, I have to be careful to be aware of my fatigue, my anxiety, my guilt, my resentment I have to be careful not to lash out at them or make them feel guilty for being normal teenage boys.
Fiset would love to play against the Colorado Avalanche, his old team, on Saturday - ``I'm not angry at them; I just want to play against my friends,'' he said - but emphasized he'll be careful not to return until he's 100 percent.