Where does “laugh-out-loud” come from?

laugh-out-loud (English) comes from English loud, from Middle English loud, from Old English hlūd, from Proto-West Germanic hlūd, from Proto-Germanic hlūdaz, from Proto-Indo-European ḱlewtos, from Proto-Indo-European ḱlew-, from Proto-Indo-European ḱel- — to cover; to incline.

laugh-out-loud (English): very funny; causing the listener to laugh aloud

Definitions

  1. very funny; causing the listener to laugh aloud

Ancestry of “laugh-out-loud”, step by step

laugh-out-loud traces back through 3 separate lines of ancestry.

via English loud

StepLanguageWordMeaning
1EnglishloudOf great intensity; Noisy; Not subtle or...
2Middle EnglishloudAlternative form of loude
3Old Englishhlūdloud, noisy, sounding, sonorous
4Proto-West Germanichlūdloud; sound
5Proto-Germanichlūdazloud; famous
6Proto-Indo-Europeanḱlewtosheard, famous
7Proto-Indo-Europeanḱlew-to hear
8Proto-Indo-Europeanḱel-to cover; to incline

via English out

StepLanguageWordMeaning
1EnglishoutAway from the inside, centre or other point of...
2Middle Englishouteout
3Old Englishūtout
4Proto-West Germanic*ūtout, outward
5Proto-Germanicūtout, outward
6Proto-Indo-Europeanúdout, outward

via English laugh

StepLanguageWordMeaning
1EnglishlaughAn expression of mirth particular to the human...
2Middle EnglishlaughenTo laugh; to break out in laughter or laughing;...
3Old Englishhlæhhan
4Proto-West Germanichlahhjanto laugh
5Proto-Germanichlahjanąto laugh
6Proto-Indo-Europeanklek-to laugh, cackle
Every word from Proto-Indo-European ḱel-Every word from Proto-Indo-European ḱlew-Every word from Proto-Indo-European ḱlewtos