transcription, транскрипция: [ slaɪ ]
1.
A sly look, expression, or remark shows that you know something that other people do not know or that was meant to be a secret.
His lips were spread in a sly smile...
ADJ : usu ADJ n
• sly‧ly
Anna grinned slyly.
ADV
2.
If you describe someone as sly , you disapprove of them because they keep their feelings or intentions hidden and are clever at deceiving people.
She is devious and sly and manipulative...
= cunning
ADJ [ disapproval ]