N. desuetude, disusage, obsolescence, disuse, want of habit, want of practice, inusitation, newness to, new brooms, infraction of usage, nonprevalence, "a custom more honored in the breach than the observance"

V. be -unaccustomed, leave off a habit, cast off a habit, break off a habit, wean oneself of a habit, violate a habit, break through a habit, infringe a habit, leave off a custom, cast off a custom, break off a custom, wean oneself of a custom, violate a custom, break through a custom, infringe a custom, leave off a usage, cast off a usage, break off a usage, wean oneself of a usage, violate a usage, break through a usage, infringe a usage, disuse, wear off

Adj. unaccustomed, unused, unwonted, unseasoned, uninured, unhabituated, untrained, new, green, unhackneyed, unusual, nonobservant, disused, 2, causes of volition