eccable

adjective [pek–uh-buhl]

liable to sin or error.            

What is the origin of peccable?

Peccable comes from Old French from the Medieval Latin adjective peccābilis “capable of sin, susceptible to sin,” formed from the Latin verb peccāre “to go wrong, make a mistake, act incorrectly, commit a moral or sexual offense.” Peccable was formed on the model of impeccable, which dates from the first half of the 16th century. Peccable entered English in the early 1600s.

How is peccable used?

In his thought at that sharp moment he blasphemed even against all that had been left of his faith in the peccable Master. Henry James, The Lesson of the Master, 1888

And Mrs. Hancock delivers Mrs. Malaprop’s peccable usages with impeccable aplomb. Nothing offends this lady so much as having someone cast ”an aspersion upon my parts of speech.”

Walter Goodman, “A Comedy of Manners by Sheridan,” New York Times, August 10, 1989