Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class V. Words Releasing to the Voluntary Powers
Division (I) Individual Volition
Section I. Volition in General
1. Acts of Volition

614. Desuetude.

   NOUN:DESUETUDE, disusage; obsolescence, disuse [See Disuse]; want of -habit, – use, – practice; inusitation [rare]; newness to; new brooms.
  NONPREVALENCE; infraction of usage (unconformity) [See Unconformity]; “a custom more honored in the breach than the observance” [Hamlet].
   VERB:BE UNACCUSTOMED &c. adj.; leave off -, cast off -, break off -, cure oneself of -, wean oneself from -, shake off -, violate -, break through -, infringe- -a habit, – a custom, – a usage; break one’s -chains, – fetters; do old things in a new way, give an original touch, give a new dress to old ideas; disuse [See Disuse]; wear off.
   ADJECTIVE:UNACCUSTOMED, unused, unwonted, unseasoned, uninured, unhabituated, untrained; new, fresh, original; impulsive &c. adj. [See Impulse]; green (unskilled) [See Unskillfulness]; unhackneyed.
  UNCONVENTIONAL, unfashionable; dissident, protestant; unusual (unconformable) [See Unconformity]; nonobservant; disused [See Disuse].
   ADVERB:CONTRARY TO -CUSTOM, – usage, – convention; for once, just once; “this time doesn’t count.”
   QUOTATION:Exceptions prove the rule.