source: Steam 커뮤니티 :: :: Happy Sugar Life

a feeling or state of intense excitement and happiness:

(一時的な)歓喜, 幸福感

e.g. the euphoria of success will fuel your desire to continue training.

late 17th century (denoting well-being produced in a sick person by the use of drugs): modern Latin, from Greek, from euphoros ‘borne well, healthy’, from eu ‘well’ + pherein ‘to bear’.