the world > action or operation > behaviour > customary or habitual mode of behaviour > unaccustomedness or state of disuse > [adjective] > not used or accustomed > little used or accustomed (2)
With an agent noun. Of a person: that carries out an action to the least degree. Obsolete.
(a) little accustomed or habituated to something; (b) having little custom, little frequented by customers.