An undercover operative infiltrated the organization.
Source: tatoeba (671670)
Undercover
//ˌʌndə(ɹ)ˈkʌvə(ɹ)//
Synonyms for "undercover" (157 found)
Ranked by relevance and common usage.
Closest matches (32)
Strong matches (47)
Related words (78)
loricatedlurkingmantledmaskedmuffledmysteriousnobody the wiserobfuscatedobscureobscuredoccultoccultedonon tiptoeout of dangerpackagedpast dangerpavedprivateprivy
Show 54 more words
prowlingpussyfootpussyfootedquietreconditeroofed-inscreenedscummedsecludedseclusesecretsecretlysequesteredsheathedshelledshieldedshiftyshroudedskulkingslinkingslinkyslysneaksneakingsneakysotto vocestealingstealthysub rosasurreptitiousswathedtentedterra firmaunder an eclipseunder coverunder house arrestunder the breathunder the roseunder wrapsunder-the-counterunder-the-tableundergroundunderhandunderhandedunderneathunknownunobtrusiveveiledwaiting concealedwalledwalled-inwith bated breathwrappedwrapped in clouds
Adjective(3 words)
Adjective(1 words)
Related word relations
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
Synonyms
2 entriesRelated terms
1 entriesderived
1 entriesderived from
2 entriesrelated to
10 entriessimilar
1 entriesTranslations
42 translations across 13 languages.
Bulgarian
3 entries- под прикритие adj (Employed or engaged in spying or secret investigation)
- таен adj (Performed or happening in secret)
- таен агент noun (A person who works undercover)
Chinese Mandarin
1 entries- 卧底 noun (A person who works undercover)
Esperanto
4 entries- inkognita adj (Employed or engaged in spying or secret investigation)
- kaŝa adj (Performed or happening in secret)
- kaŝa adj (Employed or engaged in spying or secret investigation)
- sekreta adj (Performed or happening in secret)
Finnish
2 entries- salainen adj (Performed or happening in secret)
- vakoilu adj (Employed or engaged in spying or secret investigation)
French
4 entries- clandestin adj (Performed or happening in secret)
- secret adj (Performed or happening in secret)
- secret adj (Employed or engaged in spying or secret investigation)
- agent secret noun (A person who works undercover)
German
2 entries- heimlich adj (Performed or happening in secret)
- verdeckt adj (Employed or engaged in spying or secret investigation)
Greek
4 entries- αφανής adj (Performed or happening in secret)
- κρυφός adj (Performed or happening in secret)
- μυστικός adj (Performed or happening in secret)
- μυστικός adj (Employed or engaged in spying or secret investigation)
Italian
2 entries- clandestino adj (Performed or happening in secret)
- sotto copertura adj (Employed or engaged in spying or secret investigation)
Portuguese
2 entries- encoberta adj (Performed or happening in secret)
- encoberto adj (Performed or happening in secret)
Romanian
4 entries- clandestin adj (Performed or happening in secret)
- secret adj (Performed or happening in secret)
- sub acoperire adj (Performed or happening in secret)
- sub acoperire adj (Employed or engaged in spying or secret investigation)
Spanish
4 entries- clandestino adj (Performed or happening in secret)
- de incógnito adj (Employed or engaged in spying or secret investigation)
- encubierto adj (Performed or happening in secret)
- incógnito adj (Employed or engaged in spying or secret investigation)
Turkish
4 entries- gizli kapaklı adj (Performed or happening in secret)
- gizli saklı adj (Performed or happening in secret)
- gizlice adj (Performed or happening in secret)
- saman altından adj (Performed or happening in secret)
Vietnamese
2 entries- bí mật adj (Performed or happening in secret)
- nằm vùng adj (Performed or happening in secret)
Sample sentences
13 total sentences available.
He was caught by an undercover police officer.
Source: tatoeba (1848869)
She's an undercover police officer.
Source: tatoeba (1848870)
I can't believe Tom was an undercover cop.
Source: tatoeba (1950886)
Showing 4 of 13 available sentences.
Keep exploring
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.