Equivalent
来自Big Physics
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late Middle English (describing persons who were equal in power or rank): via Old French from late Latin aequivalent- ‘being of equal worth’, from the verb aequivalere, from aequi- ‘equally’ + valere ‘be worth’.
wiktionary
equi- + -valent. From Latin aequivalentem, accusative singular of aequivalēns, present active participle of aequivaleō(“I am equivalent, have equal power”).
etymonline
equivalent (adj.)
early 15c., "equal in value, power, or effect," from Late Latin aequivalentem (nominative aequivalens) "equivalent," present participle of aequivalere "be equivalent," from Latin aequus "equal" (see equal (adj.)) + valere "be well, be worth" (from PIE root *wal- "to be strong"). As a noun from c. 1500, "that which is equal or corresponds to." Related: Equivalently.
