(warns, warning, warned)
Frequency: The word is one of the 1500 most common words in English.
1.
If you warn someone about something such as a possible danger or problem, you tell them about it so that they are aware of it.
When I had my first baby friends warned me that children were expensive...
They warned him of the dangers of sailing alone...
Analysts warned that Europe's most powerful economy may be facing trouble...
He also warned of a possible anti-Western backlash.
VERB: V n that, V n of/about n, V that, V of n
2.
If you warn someone not to do something, you advise them not to do it so that they can avoid possible danger or punishment.
Mrs. Blount warned me not to interfere...
'Don't do anything yet,' he warned. 'Too risky.'...
'Keep quiet, or they'll all come out,' they warned him...
I wish I'd listened to the people who warned me against having the operation...
VERB: V n to-inf, V with quote, V n with quote, V n against n/-ing