Meaning

adjective worthy of or requiring responsibility or trust; or held accountable

adjective being the agent or cause

adjective having an acceptable credit rating

originFrom Middle French responsable, from Old French responsable, responsible, formed from the root of Latin responsus, from respondere. The spelling of the English word is taken from the Old French variant responsible. By surface analysis, response + -ible.

Etymology from Wiktionary, CC BY-SA 3.0