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Classic usage
Reading level: hard
Estimated CEFR level: C1 — Advanced
Estimated from word frequency; not an official CEFR classification.
From Middle English crammen, from Old English crammian (“to cram; stuff”), from Proto-West Germanic *krammōn, from Proto-Germanic *krammōną, a secondary verb derived from *krimmaną (“to stuff”), from Proto-Indo-European *ger- (“to assemble; collect; gather”). Compare Old English crimman (“to cram; stuff; insert; press; bruise”), Icelandic kremja (“to squeeze; crush; bruise”).
jam, jampack, ram, chock up, wad
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Classic usage
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