The quality or state of being charmful; the degree to which something possesses charm or allure.
Charmful + -ness (abstract noun suffix). Creates a noun describing the abstract quality of being full of charm.
English loves stacking suffixes—'charm' → 'charmful' → 'charmfulness' shows how one root word can generate a whole family, but notice we'd usually just say 'charm' or 'appeal' instead!
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