surreptitiousの基本例文
The spy made a surreptitious entrance into the building.
スパイは建物に内緒で入った。
He took a surreptitious glance at his phone under the table.
彼はテーブルの下で内緒で携帯を見た。
She gave a surreptitious smile to her friend across the room.
彼女は部屋の向こうにいる友達に内緒で微笑んだ。