Where does “sick” come from?

Sick comes from English seek, which derives from Proto-Indo-European so, Latin si, and Proto-Indo-European sey- combined with the suffix -kos.

sick (English): In poor health; ill; Having an urge to vomit;...

Definitions

  1. In poor health; ill; Having an urge to vomit;...

Ancestry of “sick”, step by step

sick traces back through two separate lines of ancestry.

via English sic

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

via Middle English sik

StepLanguageWordMeaning
1Middle Englishsiksick, ill
2Old EnglishsecAlternative form of sēoc
3Proto-West Germanicseuksick
4Proto-Germanicseukazsick
5Proto-Indo-Europeanseug-to be troubled or grieved

Words derived from “sick

Every word from Proto-Indo-European seh₂g-
sick — Etymology, Origin & Word History | Etymology Explorer