IPA: //ˈraɪəntli//
KK: /ˈraɪəntli/
In a cheerful or joyful way; expressing happiness or delight.
She smiled riantly at the good news.
This word originates from the Middle English 'riant', meaning laughing or cheerful, derived from the Old French 'riant', which is the present participle of 'rir', meaning to laugh. The suffix '-ly' indicates a manner or quality. Therefore, 'riantly' means in a manner that is cheerful or laughing.
Think of someone laughing or being cheerful ('riant') and remember that 'riantly' describes doing something in a cheerful manner.