clandestine

adjective

clan·des·tine klan-ˈde-stən

also -ˌstīn ,

or -ˌstēn,

or ˈklan-də-

Synonyms of clandestine next

: marked by, held in, or conducted with secrecy : surreptitious

a clandestine love affair

clandestinely adverb

clandestineness noun

clandestinity

ˌklan-də-ˈsti-nə-tē

-de-ˈsti-

noun

Did you know?

Psst!—if your first instinct, upon being asked what you’ve been up to, is to clam up, your querier may suspect you’ve been involved in some clandestine activities. Clandestine often substitutes for secret and covert, and it is commonly applied to actions that involve secrecy maintained for an evil, illicit, or unauthorized purpose, as in "clandestine activities pursued under cover of night." It comes to English by way of Middle French, from the Latin word clandestinus, which is itself from the Latin adverb clam, meaning "secretly." Note that this clam is not the ancestor of the English word clam, despite how tightly sealed and thus secretive the bivalves may seem.

Choose the Right Synonym for clandestine

secret, covert, stealthy, furtive, clandestine, surreptitious, underhanded mean done without attracting observation.

secret implies concealment on any grounds for any motive.

met at a secret location

covert stresses the fact of not being open or declared.

covert intelligence operations

stealthy suggests taking pains to avoid being seen or heard especially in some misdoing.

the stealthy step of a burglar

furtive implies a sly or cautious stealthiness.

lovers exchanging furtive glances

clandestine implies secrecy usually for an evil, illicit, or unauthorized purpose and often emphasizes the fear of being discovered.

a clandestine meeting of conspirators

surreptitious applies to action or behavior done secretly often with skillful avoidance of detection and in violation of custom, law, or authority.

the surreptitious stockpiling of weapons

underhanded stresses fraud or deception.

an underhanded trick

Examples of clandestine in a Sentence

The clandestine meetings, the passing back and forth of messages between Lodge and the plotters, the coaxing along of the generals, all had the emotional lift of a strong amphetamine. —

Neil Sheehan, A Bright Shining Lie, 1988

The CIA's great innovation has been to concentrate in peacetime on 'covert action'—that is, the use of clandestine means to challenge policies and regimes in other countries. —

Arthur M. Schlesinger, Jr., The Cycles of American History, 1986

And Pym was in London for a conference—no, he wasn't, he was attending a three-day course on the latest methods of clandestine communication in a beastly little training house off Smith Square. —

John le Carré, A Perfect Spy, 1986

I took a clandestine peek at the price tag on the diamond necklace.

Recent Examples on the Web

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Israel has a long history of conducting brazen spy operations abroad, including in Iran, where such clandestine activities have been linked to acts of sabotage against nuclear facilities and the assassinations of nuclear scientists. —

David Faris, Newsweek, 4 Nov. 2024 Many of those missing are buried in clandestine graves all across the country. —

Geraldine Castro, WIRED, 1 Nov. 2024 Israel used clandestine operations to assassinate key Iranian figures and execute cyberattacks on vital facilities as Iran continued activating its Arab proxy militias to attack the Jewish state. —

Mostafa Salem, CNN, 29 Oct. 2024 Anecdotes gleaned from clandestine meetings with an anonymous investigator underscore Yamaguchi’s power. —

Lovia Gyarkye, The Hollywood Reporter, 26 Oct. 2024 See all Example Sentences for clandestine