Laughter
来自Big Physics
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Old English hleahtor, of Germanic origin; related to German Gelächter, also to laugh.
wiktionary
From Middle English laughter, laghter, laȝter, from Old English hleahtor(“laughter, jubilation, derision”), from Proto-Germanic *hlahtraz(“laughter”), from Proto-Indo-European *klek-, *kleg-(“to shout”). Cognate with German Gelächter(“laughter, hilarity, merriment”), Danish and Norwegian latter(“laughter”), Icelandic hlátur(“laughter”). More at laugh.
etymonline
laughter (n.)
late 14c., from Old English hleahtor "laughter; jubilation; derision," from Proto-Germanic *hlahtraz (source also of Old Norse hlatr, Danish latter, Old High German lahtar, German Gelächter); see laugh (v.).
