G0249 (ἄλογος/alogos)
This word describes a person, thing, or idea. It is an adjective.
* This word can describe animals, because they are unable to think in the ways  that people think.
* This word can describe people who do not think clearly. 
* This word can describe an activity or behavior that someone does without thinking carefully about whether or not it is good to do it.

See: Acts 25:27; 2 Peter 2:12; Jude 1:10