equal (v.) Look up equal at Dictionary.com
1580s, "compare, liken, consider as equal" (obsolete), also "match, rival, become equal to," from equal (adj.). Related: Equaled; equaling.
equal (n.) Look up equal at Dictionary.com
1570s, from equal (adj.).
equal (adj.) Look up equal at Dictionary.com
late 14c., "identical in amount, extent, or portion;" early 15c., "even or smooth of surface," from Latin aequalis "uniform, identical, equal," from aequus "level, even, flat; as tall as, on a level with; friendly, kind, just, fair, equitable, impartial; proportionate; calm, tranquil," which is of unknown origin. Parallel formation egal (from Old French egal) was in use late 14c.-17c. Equal rights is from 1752; by 1854 in American English in reference to men and women. Equal opportunity (adj.) in terms of hiring, etc. is recorded by 1925.