n.
Pronunciation: ' de-swi- ˌ tüd, - ˌ tyüd, di- ' sü- ə -, - ' syü-
Function: noun
Etymology: Middle English dissuetude, from Latin desuetudo, from desuescere to become unaccustomed, from de- + suescere to become accustomed; akin to Latin sodalis comrade ― more at SIB
Date: 15th century
: discontinuance from use or exercise : DISUSE