## Etymology
From behavior + the suffix -ism (denoting a doctrine or theory). Coined in psychology in the early 20th century (associated with J. B. Watson). Behavior is ultimately from Old English behabban via Middle English behaven.

## AI Etymology
behaviorism comes from behavior + the suffix -ism (denoting a doctrine or theory). Coined in psychology in the early 20th century (associated with J. B. Watson). Behavior is ultimately from Old English behabban via Middle English behaven. Morphologically, the word is transparent as a compound: its parts remain visible in the modern spelling, while the older history of those parts supplies the deeper ancestry. In modern use, the noun sense is "the psychological theory that behavior can be explained by conditioning", which keeps the etymology connected to the word's present dictionary value rather than treating it as a merely historical label. The wider word family includes related English forms such as behavior, behavioral, behave and derivatives such as behaviorist, behavioristic, showing how the same base continues to support neighboring English vocabulary. The principal historical forms in the chain include Old English habban, Latin -ismus, which anchor the explanation in named linguistic material.

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