Where does “looniness” come from?

looniness (English) comes from English loony, from English loon, from Middle English louen, from Middle English loue, from Middle English lah, from Old Norse lágr, from German lager, from Middle High German leger — to lie.

looniness (English): The state or condition of being loony; craziness,...

Definitions

  1. The state or condition of being loony; craziness,...

Ancestry of “looniness”, step by step

looniness traces back through two separate lines of ancestry.

via English loony

StepLanguageWordMeaning
1EnglishloonyInsane; Very silly, absurd; An insane or very...
2EnglishloonAn idler, a lout; A boy, a lad; A harlot;...
3Middle Englishlouento low
4Middle EnglishloueAlternative form of lah
5Middle Englishlahlow
6Old Norselágrlow; short
7Germanlagerfirst-person singular present of lagern; singular...
8Middle High Germanleger
9Old High Germanlegar
10Old Norselegr
11Proto-Germaniclegrąa lying, a place where one lies; camp
12Proto-Indo-Europeanlegʰ-to lie

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European legʰ-Every word from Proto-Germanic legrąEvery word from Old Norse legr