- pep (n.)
[pep 词源字典] - "vigor, energy," 1912, shortened form of pepper (n.), which was used in the figurative sense of "spirit, energy" from at least 1847. Pep rally is attested from 1945; pep talk from 1926. To pep (something) up is from 1925.[pep etymology, pep origin, 英语词源]
