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Classic usage
Pronunciation: /ˈfɪltɚ/
Reading level: hard
Estimated CEFR level: C1 — Advanced
Estimated from word frequency; not an official CEFR classification.
From Middle English filtre, from Medieval Latin filtrum (compare also Old French feutre (“felt; filter”)), from Frankish *filtir, from Proto-West Germanic *felt. See felt. Doublet of phin.
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tap / space
Classic usage
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