出典:Wiktionary
From Middle English laughter, laghter, laȝter, from 古期英語 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.
laughter (usually uncountable, 複数形 laughters)
a person's laughter
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laughter
ひと笑い
laughter
coarse laughter
boisterous laughter
uproarious laughter
contemptuous laughter
笑うこと
wicked laughter
grim laughter
大笑い.
joyous laughter
insane laughter