integer
n.
"a whole number" (opposed to fraction), 1570s, from Latin integer (adj.) "whole, complete," figuratively, "untainted, upright," literally "untouched," from in- "not" (see in-(1)) + root of tangere "to touch" (see tangent, adj.). The word was used earlier in English as an adjective meaning "whole, entire" (c.1500).
〔蒋〕整数,完整的东西