amount (v.) Look up amount at Dictionary.com
late 13c., "to go up, rise, mount (a horse)," from Old French amonter "rise, go up; mean, signify," from amont (adv.) "upward, uphill," literally "to the mountain" (12c.), a contraction of the prepositional phrase a mont, from a (from Latin ad "to;" see ad-) + Latin montem (nominative mons) "mountain" (see mount (n.1)). Meaning "to rise in number or quality (so as to reach)" is from c. 1300. Simple mount (v.) is not used in the physical senses. Related: Amounted; amounting.
amount (n.) Look up amount at Dictionary.com
"quantity, sum," 1710, from amount (v.). As nouns, Middle English had amountance, amountment.