noun
geniality
jee-nee-AL-uh-tee/ˌdʒiːniˈæləti/
Warm friendliness and cheerful good nature.
Her geniality puts even the most nervous guests at ease.

Etymology
The “pleasant, festive” base forms a noun for that quality. English geniality first meant festivity, then shifted toward personal cheerfulness and warm friendliness.
In context
the multitudinous wrinkles that covered his face arranged themselves into a sort of diagram of geniality it was the crinkliest smile that I had ever seen But A singularly Pleasant one
More examples
- The teacher greets every student with genuine geniality.
- Even during disagreements, he maintains his usual geniality.
- Customers appreciate the owner's geniality as much as the food.
Forms
genial adjective — Warmly friendly and cheerful toward others.
genially adverb — In a warmly friendly, cheerful manner.
Similar words
- friendliness
- Emphasizes welcoming behavior without necessarily suggesting a cheerful temperament.
- amiability
- Emphasizes a pleasant, agreeable disposition more than cheerful warmth.
- cordiality
- Emphasizes warmth in greetings and interactions, sometimes in formal settings.