warn against

Also found in: Idioms.
See: admonish, warn
References in classic literature ?
"This is the young man whom we were to warn against the Porphyrion.
Meteorologists warn against storms and potential floods that may occur in the following days.
The FDA wants consumers to remember the saying, "if it seems too good to be true, it probably is." They also warn against any product that claims to be a "scientific breakthrough" and suggest consulting a doctor before buying any OTC products.
Summary: Sharjah Police warn against following fake accounts.
Summary: Municipality warn against misusing parking spaces
Pagasa, however, continued to warn against sea travel over the eastern seaboards of southern Luzon and the Visayas due to Bising.
The Minister who was addressing training workshop for journalists in Khartoum under the time of "combating tobacco is not of concern to the state alone, but to the whole community , citizen and the country's economy" saying a campaign would be intensified to warn against the hazards of smoking.
Global Banking News-September 21, 2015--Spanish banks warn against Catalan breakaway
It did warn against travel to 41 destinations closed to or considered dangerous for Israelis.
BAGHDAD / Aswat al-Iraq: A Kurdish bloc MP said that the Iraqi present situation obliges us to warn against the eruption of a civil war after the US forces withdrawal.
"We warn against the dangerous repercussions of plots planned by the enemies of our Islamic and Arab nation starting with the division of Sudan as an introduction to the division of the region," the statement said.
US Experts on Yemeni Affairs Warn against Deployment of US Forces There