jovial

the word 'jovial' has an astrological origin, directly descending from the latin name for the planet jupiter, iovis. in medieval astrology, it was believed that those born under the influence of the planet jupiter possessed a cheerful, optimistic, and generous temperament. the latin stem iov- was combined with the adjectival suffix -alis (english -ial) to form the late latin iovialis, meaning 'of jupiter'. this term entered english in the late 16th century, evolving from its literal astrological sense to its modern abstract meaning of being markedly good-humored and merry, reflecting the positive qualities ascribed to the planetary influence.

Structure: jov (jupiter) + ial (adjective suffix) jov (from latin iov-, the stem of iuppiter or iovis, the name of the roman king of the gods, jupiter); ial (a latin-derived adjective-forming suffix meaning 'of, relating to, or characterized by').