clandestine

/kɫænˈdɛstɪn/

kept secret because illicit or improper

clandestine in a sentence

“They held clandestine meetings in the warehouse.”

Latin clandestinus secret, hidden from clam secretly

Related Words

surreptitious

kept secret, especially because improper

furtive

attempting to avoid notice or attention

stealthy

behaving so as to avoid detection

cryptic

having a meaning that is mysterious or obscure

enigmatic

difficult to interpret or understand; mysterious

inscrutable

impossible to understand or interpret