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inform on

VERB
betray
Synonyms
STRONGEST
abandon deceive forsake mislead seduce
STRONG
bluff cross delude desert finger jilt knife trick
WEAK
be unfaithful bite the hand that feeds you blow the whistle break faith break promise break trust break with commit treason deliver up double-cross go back on inform against let down play Judas play false sell down the river sell out stab in the back take in turn in turn informer turn state's evidence walk out on
Antonyms
STRONG
aid assist help stay
WEAK
be faithful be loyal be quiet defend hide keep secret protect support
VERB
stab in the back
Synonyms
WEAK
abandon backstab be disloyal be unfaithful betray break promise commit treason cross deceive double-cross finger go back on play Judas sell down the river sell out trick turn in turn informer turn traitor

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"These individuals risked their lives to infiltrate and inform on the activities of our nation's most radical and violent extremist groups," he said.

From BBC • Apr. 22, 2026

Gold and silver futures started higher for the week ahead of some key economic reports that may inform on what the Federal Reserve’s interest rate moves in 2026 may look like.

From The Wall Street Journal • Dec. 16, 2025

They are afraid of their neighbors who might inform on them to the police.

From Slate • Oct. 29, 2025

"Overall, neuron counts do inform on intelligence, but are very limited in telling us what exactly animals are capable of," said George.

From Salon • May 4, 2024

Having grabbed the congregation’s attention, Shin then introduced himself as a predator who had been bred in the camp to inform on family and friends—-and to feel no remorse.

From "Escape from Camp 14: One Man's Remarkable Odyssey from North Korea to Freedom in the West" by Blaine Harden