disuse
n.
c.1400, see dis- + use, n..
v.
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.
〔李〕[dis-;us;-e] v.不用，废弃 n.不用，废弃 ←ut,us (L uti,usus)=to use 利用