Where does “heatsick” come from?

heatsick (English) comes from English sick, from English sic, from English seek, from Middle English seke, from Old English sēċan, from Proto-West Germanic sōkijan, from Proto-Germanic sōkijaną, from Proto-Indo-European séh₂gyeti — to seek out.

heatsick (English): unwell from exposure to heat

Definitions

  1. unwell from exposure to heat

Ancestry of “heatsick”, step by step

heatsick traces back through two separate lines of ancestry.

via English sick

StepLanguageWordMeaning
1EnglishsickIn poor health; ill; Having an urge to vomit;...
2EnglishsicThus; thus written; To mark with a bracketed sic;...
3EnglishseekTo try to find; to look for; to search for; To...
4Middle EnglishsekeAlternative form of seken
5Old Englishsēċanto seek or inquire about
6Proto-West Germanicsōkijanto seek, to look for
7Proto-Germanicsōkijanąto seek, look for
8Proto-Indo-Europeanséh₂gyetito give a sign
9Proto-Indo-Europeanseh₂g-to seek out

via English heat

StepLanguageWordMeaning
1EnglishheatThermal energy; The condition or quality of being...
2Middle EnglishhetenAlternative form of hetien
3Old Englishhǣtanto heat; become hot
4Proto-West Germanichaitijanto make hot, heat
5Proto-Germanichaitijanąto make hot, heat
6Proto-Germanic-janąDerives denominatives from nouns and factitives...
7Proto-Indo-European-yétiCreates intransitive, often deponent,...
8Proto-Indo-Europeanyé-
9Chichewaiyehe, she
Every word from Proto-Indo-European seh₂g-Every word from Proto-Indo-European séh₂gyetiEvery word from Proto-Germanic sōkijaną