IPA: /ɡrɪmli/
KK: /grɪmli/
Not cheerful or hopeful; serious and stern in appearance or attitude.
She looked at him grimly, knowing the situation was serious.
In a way that shows seriousness, sadness, or a lack of hope.
She smiled grimly at the thought of the difficult task ahead.
Grimly → It is formed from "grim" (from Old English *grim*, meaning fierce or cruel) and the suffix "-ly" (meaning in a manner of). The word "grimly" means in a fierce or cruel manner.
Think of someone acting in a 'fierce' way ('grim') — the '-ly' shows how they are doing it, so 'grimly' means doing something in a fierce manner.