Clandestine
/klæˈndɛstɪn/
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Definition
(adj) Done or kept in secret, sometimes to conceal an illicit or improper purpose.
Sentence Examples
He was suspected of being active in a clandestine movement.
Sami and Layla began a clandestine relationship.
CEFR Practice Quiz
The spies held several ____ meetings in a dark alley.