blissful
adjective
Filled with deep joy, or bringing a feeling of perfect happiness.
Example sentences
- “They spent a blissful week doing nothing but swimming and relaxing.”
- “The baby gave a blissful sigh and fell asleep in her father's arms.”
"Blissfully unaware" and "blissful ignorance" are the set phrases, both with an ironic edge: the happiness comes from not knowing.