docile (adj.)

late 15c. (Caxton), "easily taught, quick to learn," from Italian or French docile, from Latin docilis "easily taught," from docere "to show, teach, cause to know," originally "make to appear right," causative of decere "be seemly, fitting," from PIE root *dek- "to take, accept." Sense of "obedient, submissive, easily managed, tractable" is recorded by 1774. Middle English also had docible "ready or willing to teach" (c. 1400).