Do you know ghouls from goblins and ghosts?
1550s, from French docilité (15c.), from Latin docilitatem (nominative docilitas), from docilis (see docile).
late 15c., "easily taught," from Italian or French docile, from Latin docilis "easily taught," from docere "teach" (see doctor). Sense of "obedient, submissive" first recorded 1774.