Automatic
Part of speech: adjective
Definition: Capable of operating without external control or intervention. Done out of habit or without conscious thought. Firing continuously as long as the trigger is pressed until ammunition is exhausted. Being added and removed from the stack automatically during the course of function calls.
Part of speech: noun
Definition: A car with automatic transmission. A semi-automatic firearm.
Example sentence: God has no grandchildren. He has only children, so being a born-again Christian is not an automatic thing.
Involuntary
Part of speech: adjective
Definition: Without intention; unintentional.Not voluntary or willing; contrary or opposed to explicit will or desire; unwilling.