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to inform

to inform

15 6.8
To secretly tell the police about someone's illegal actions
  • verb
  • /ɪnˈfɔrm/
: delatar
  • Ladies and gentlemen, I regret to inform you there is a criminal in our midst.

Look at the people willing to inform on their neighbors.

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Examples

  • The whistleblower decided to inform the authorities about the illegal activities happening in the company.

  • Look at the people willing to inform on their neighbors.

  • When they brought me in for questioning, I informed on my friends the very first day.

    Fiction book (1991)
  • I informed SIS, they've made note of it, but it is not illegal to phone someone.

  • The man, who asked to remain anonymous, informed the police of the woman's daring attempt to rescue him and praised her bravery in bringing him down off the mountain all on her own.

  • To protect her community, she chose to inform on the drug dealers operating nearby.

  • He felt obligated to inform the police about his neighbor's suspicious behavior.

Synonyms

to tell
vsto inform
688 2.7

Report someone's actions to the police or an authority

can be secret and informal rather than an open official statement
to rat out
vsto inform
  • Informal
80 8.6

To tell the police or another authority about someone's bad action, betraying their trust

focuses on wrongdoing reporting rather than general exposure
to snitch
vsto inform
  • Slang
51 7.9

To secretly tell the police or a person in charge about someone's bad actions

focuses on wrongdoing rather than on betraying personal trust
to tell on
vsto inform
  • Informal
47 4.4

To report to a person in charge that someone did something wrong so they get in trouble

does not aim to cause the person's punishment
to blow the whistle
vsto inform
39 5.1

To tell the authorities or the public about wrongdoing

is private reporting to authorities rather than formal public exposing
to betray
vsto inform
24 4.6

Tell someone's secret to other people

aims at reporting to authorities rather than at general disclosure
to tattle
vsto inform
  • Informal
10 7.0

Tell a person in charge about someone else's bad actions in a childish way

relates to secret reporting about wrongdoing, not childish gossip
to peach
vsto inform
  • Archaic
2 9.9

To tell authorities secret information about someone to get them in trouble

focuses on reporting wrongdoing rather than on general betrayal
to denounce
vsto inform
  • Formal
1 6.5

Tell authorities about someone, often exposing them to punishment

is carried out privately rather than as a public denunciation
to shop
vsto inform
  • Informal
1 8.0

To tell the police or a manager that someone did something wrong

targets secret information rather than formal legal action
to dob in
vsto inform
  • UK
1 9.9

To tell the police or a teacher that someone did something wrong

involves secret disclosures rather than direct formal complaints
to sing
vsto inform
  • Slang
1 8.4

To tell secret information to the police or other officials

focuses on providing evidence about crimes rather than on betrayal

Antonyms

179 3.7

To hide something so others cannot see or find it

How Official

to report
533 1.6
to inform
15 6.8
to tattle
  • Informal
10 7.0
to tell
∞ 1.0

Surface Forms

inform infinitive
informed past
informed past participle
informing present participle
informs third person singular

Morphology

inform = form (semi-transparent) = in + form

The 'inform (on/against)' sense is an extension of 'give information' and is not directly inferable from 'form' for many learners, though it is related historically.

Etymology

The word inform can also mean 'to tell on' someone; it grew from the same idea of giving facts for official use, coming from in- 'into' and formare 'to form'. So to inform on someone is to report them to the police or other authorities.