caution
The newspaper cautioned its readers against buying shares without first getting professional advice.
He cautioned both parents against being overprotective of their child.
I don't disagree with her views, but I would caution her against exaggeration.
Jurors were cautioned against discussing the case outside the courtroom.

SMART Vocabulary: related words and phrases

Threats & warnings
advance warning
alarm
alarm bell
bell-ringing
beware the ides of Marchidiom
bomb scare
bow
brushback pitch
burglar alarm
cautionary
don't you dareidiom
early warning system
hear warning bellsidiom
one swallow doesn't make a summeridiom
protection racket
red alert
red flag
scare quotes
screamer
yellow card

caution against sth | Business English

caution against sth

phrasal verb with cautionverb[ T ]uk /ˈkɔːʃən/us
to tell someone that doing something is not a good idea:
caution (sb) against sth/doing sthMany economists caution against reading too much into one month's report.