proclivity
"Proclivity" is a formal word with essentially one core meaning — a natural tendency or preference toward something. It's the kind of word you'll find in books, essays, and formal writing rather than everyday conversation.
A proclivity is a strong, natural leaning toward a particular behavior, activity, or interest — something you are drawn to almost automatically. Think of it as a built-in preference. It often suggests the tendency is deep-rooted, not just a passing interest. It can describe both positive habits and negative ones.
formal writing, psychology, literature · Formal, used across centuries but still common today
When used in a critical or cautionary context, 'proclivity' often highlights a tendency toward something harmful or undesirable. It suggests the behavior is not accidental — it is a pattern. This is one of the most common ways the word appears in journalism and legal writing.
journalism, law, formal discussion · Modern, widely used