disuse (v.) Look up disuse at Dictionary.com
c. 1400, "misuse, pervert;" mid-15c., "become unaccustomed," from or on analogy of Old French desuser, from des- "not" (see dis-) + user "use" (see use (v.)). Related: Disused.
disuse (n.) Look up disuse at Dictionary.com
c. 1400, see dis- + use (n.).