Origin: Latin suffix -al
Behavioral has 2 different meanings across 1 category:
Of or relating to behavior.
"The behavioral changes observed in the group were attributed to the new training program."
In plain English: Behavioral describes actions and reactions that show how someone acts instead of just what they think or feel inside.
"The teacher noticed that his behavioral problems were getting worse since he started skipping school."
The word behavioral comes from combining the root behavior with the suffix -al to form an adjective describing actions or reactions. It entered English as a straightforward grammatical addition rather than evolving from a distinct historical shift in meaning.