Full of frowns; characterized by much frowning or a frowning expression.
Combines 'frown' (Middle English, from Old French 'frogne') with the suffix '-ful' (from Old English 'full'), which means 'full of' or 'characterized by'.
The suffix '-ful' lets us turn almost any noun into an adjective meaning 'full of' that thing—'frownful' is poetic and archaic, but it shows how creatively speakers once described emotional states written all over someone's face.
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