Rivalry
来自Big Physics
wiktionary
rival + -ry
etymonline
rivalry (n.)
"act of rivaling, competition, strife or effort to attain an object another is pursuing," 1590s; from rival (n.) + -ry. Shakespeare has rivality ("Antony and Cleopatra"), but meaning "association, partnership, equality in rank," from the secondary sense of the Latin adjective. Jonson has rivalship (1630s); rivaltry (1640s) also was used.
