insider

[in-sahy-der] / ˌɪnˈsaɪ dər /

NOUN

accessory

Synonyms

STRONG

abettor accomplice aid aide assistant associate colleague confederate conspirator helper partner plant ringer shill stall subordinate

WEAK

co-conspirator

Antonyms

STRONG

antagonist boss enemy foe leader opponent superior

WEAK

principal

NOUN

accomplice

Synonyms

STRONGEST

aide associate co-conspirator collaborator conspirator

STRONG

abettor accessory aid ally assistant colleague confederate partner plant stall

Antonyms

STRONG

antagonist enemy

WEAK

adversary opponent

NOUN

cognoscente

Synonyms

STRONG

connoisseur critic expert judge specialist

Antonyms

STRONG

ignoramus

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.

Rocket Lab stock fell 15% to $122.39 on Monday, following a rally in May and significant insider sales.

From Barron's • Jun. 3, 2026

DOJ is investigating former congressman George Santos for insider trading on Kalshi.

From MarketWatch • Jun. 3, 2026

Because their data access often lacks oversight, AI agents can inadvertently boost insider threats “just by working as designed,” said Eran Barak, co-founder and chief executive of cybersecurity firm MIND.

From The Wall Street Journal • Jun. 2, 2026

Cybercriminals are hijacking companies’ internal artificial-intelligence agents to steal sensitive business data, creating new insider threat risks.

From The Wall Street Journal • Jun. 2, 2026

This was also the time that Ellsberg made the unsettling discovery that he was not quite the insider he’d thought he was.

From "Most Dangerous: Daniel Ellsberg and the Secret History of the Vietnam War" by Steve Sheinkin

insider

Example Sentences

Related Words