IPA: /ˈkɔɪli/
KK: /kɔɪli/
In a way that is shy or modest, often in a playful or flirtatious manner.
She smiled coyly at him, making it clear she was interested but not too forward.
Coyly → It is formed from "coy" (from Middle English *coi*, meaning quiet or shy) and the suffix "-ly" (meaning in a manner of). The word "coyly" means in a shy or modest manner, often with a playful or flirtatious undertone.
Think of someone being 'quiet' or 'shy' ('coy') and doing so 'in a manner' ('-ly'). This helps you remember that 'coyly' describes a shy or modest way of behaving.