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disuse

noun

discontinuance of use or practice: Traditional customs are falling into disuse.

verb (used with object), dis·used, dis·us·ing.

to cease to use.

noun

the condition of being unused; neglect (often in the phrases in or into disuse)

c.1400, see dis- + use (n.).

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.