1520s, "liable to customs or dues;" c. 1600, "according to established usage, habitual," from Medieval Latin custumarius, from Latin consuetudinarius, from consuetitudinem (see custom (n.)). In Middle English it was a noun, "written collection of customs" of a manor or community. Earlier words for "according to established usage" were custumal (c. 1400, from Old French), custumable (c. 1300). Related: Customarily.
1590s, "liable to make answer or defense, accountable," from Anglo-French amenable, from Old French amener "bring, take, conduct, lead" (to the law), from "to" (see ad-) + mener "to lead," from Latin minare "to drive (cattle) with shouts," variant of minari "to threaten," also "to jut, project" (from PIE root *men- (2) "to project"). Sense of "tractable" is from 1803, from notion of "disposed to answer or submit to influence." Related: Amenably.
late 14c., of material things, "subject to decay or putrefaction, perishable," from Old French corroptible (14c.) or directly from Late Latin corruptibilis "liable to decay, corruptible," from past-participle stem of Latin corrumpere "to destroy; spoil," figuratively "corrupt, seduce, bribe" (see corrupt (adj.)).
Of persons, "susceptible of being changed for the worse, tending to moral corruption," mid-15c. As "open to bribery" from 1670s. Related: Susceptibility (late 15c.).
1809, earlier as a medical Latin word in English, from Latin susurrus, literally "a humming, muttering, whispering" (see susurration).
Among the diseases of the ear, one of the most prevalent is the Paracusis imaginaria, to which both sexes are equally liable; and another variety of the same tribe, more frequent among female patients, called the Susurrus criticus, or Scandal-buzz. [The Lounger, Dec. 23, 1786]