Frosty
来自Big Physics
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wiktionary
From Middle English frosty, forsty, from Old English forstiġ, fyrstiġ(“frosty”), from Proto-West Germanic *frostag, *frustīg, equivalent to frost + -y. Cognate with West Frisian froastich(“frosty”), Dutch vorstig(“frosty”), German Low German fröstig(“frosty”), German frostig(“frosty”), Swedish frostig(“frosty”). Compare also Saterland Frisian froasterch(“frosty”), German Low German frösterg(“frosty”).
etymonline
frosty (adj.)
Old English forstig, fyrstig "as cold as frost;" see frost (n.) + -y (2). Figurative use from late 14c. Related: Frostily; frostiness. Similar formation in Dutch vorstig, German frostig.
