Full of freak qualities; characterized by being very strange, unusual, or monstrous.
From 'freak' plus the common adjective suffix '-ful' (Old English 'full', meaning full of or characterized by). The suffix has been used for over a thousand years to create adjectives.
The '-ful' suffix lets us pack meaning into single words—'freakful,' 'fearful,' 'joyful'—but interestingly, we rarely use 'freakful' anymore in favor of 'freakish,' showing how languages constantly retire old tools in favor of new ones.
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