Where does “lunatical” come from?

lunatical (English) comes from English lunatic, from Middle English lunatik, from Old French lunatique, from Latin lūnāticus, from Latin lūna, from Old Latin losna, from Proto-Italic louksnā, from Proto-Indo-European lówksneh₂ — bright; to shine; to see.

lunatical (English): Lunatic

Definitions

  1. Lunatic

Ancestry of “lunatical”, step by step

lunatical traces back through two separate lines of ancestry.

via English lunatic

StepLanguageWordMeaning
1EnglishlunaticAn insane person; Crazed, mad, insane, demented
2Middle Englishlunatiklunatic
3Old Frenchlunatique
4LatinlūnāticusOf, or living on, the moon
5Latinlūna
6Old Latinlosna
7Proto-Italiclouksnāmoon
8Proto-Indo-Europeanlówksneh₂moon
9Proto-Indo-Europeanlewḱ-lynx
10Proto-Indo-Europeanlewk-bright; to shine; to see

via English AL

StepLanguageWordMeaning
1EnglishALInitialism of assembly language; Initialism of...
2Dutchalall, all of; already; yet
3Middle Dutchalall, all of; completely; even though, no matter...
4Old Dutchāl
5Proto-West Germanicallall
6Proto-Germanicallazall
7Proto-Indo-Europeanh₂él-to grow, nourish
Every word from Proto-Indo-European lewk-