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surreptitious
01
ひそかな
doing something secretly in an attempt to avoid notice
02
ひそかな
conducted with or marked by hidden aims or methods
例
The thief made a surreptitious escape through the back alley after the heist.
She took a surreptitious photo of the document while the manager wasn’t looking.
He cast a surreptitious glance at his watch during the long meeting to check the time.
The spy made a surreptitious entry into the building to avoid attracting attention.
The children exchanged surreptitious smiles, knowing they were up to mischief.
