Cheerily
/ˈtʃɪrəli/
Definition 1 of 1
Pro Tip 1/3Positive Tone
Use 'cheerily' to describe actions done with a positive and enthusiastic attitude. 
He cheerily accepted the invitation.
Pro Tip 2/3Warmth in Greeting
'Cheerily' is often used when someone is greeting another person in a warm and friendly manner. 
The shopkeeper cheerily welcomed every customer.
Pro Tip 3/3Mood Elevator
The word 'cheerily' can boost the mood of a sentence, making it seem more lively and happy. 
She cheerily announced the good news.