The quality or state of being habitual, done regularly or by routine.
From habitual (adjective meaning done by habit) plus the suffix -ness (which creates nouns meaning state or condition). Habitual comes from Latin habitualis, derived from habitus (habit or condition).
This word captures something psychologists study extensively: how our brains automate behaviors through repetition, freeing up mental energy for new tasks—why you can brush your teeth while thinking about dinner.
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