Euphoric (adjective)

1. Feeling very happy and excited; characterized by or feeling intense happiness and self-confidence.
2. Marked by feelings of elation and well-being.

Origin:

From late latin euphoricon, from greek εὐφορικός (euphorikos, "of good cheer"), from εὖ (eu, "well") + φέρω (phero, "i bear").

Examples:

1. She felt euphoric after winning the race.
2. The concert-goers were euphoric after the band's performance.
3. The euphoric feeling after a good workout is often referred to as a "runner"s high".
4. The drug's euphoric effects are what makes it so addictive.
5. The euphoric atmosphere of the party was infectious.