Where does “rattishness” come from?

rattishness (English) comes from English rattish, from English ratty, from English -y, from Middle English -y, from Old English -iġ, from Proto-West Germanic -g, from Proto-Germanic -gaz, from Proto-Indo-European -ḱos — -y, -ic.

rattishness (English): The quality of being rattish

Definitions

  1. The quality of being rattish

Ancestry of “rattishness”, step by step

rattishness traces back through two separate lines of ancestry.

via English rattish

StepLanguageWordMeaning
1Englishrattishpertaining to rats; exhibiting qualities that are...
2EnglishrattySimilar to a rat; ratlike; Infested with rats; In...
3English-yAdded to nouns and adjectives to form adjectives...
4Middle English-yDesignates an adjective, in many cases formed by...
5Old English-iġ-y, -ic
6Proto-West Germanic-gForms adjectives from nouns and verbs with a...
7Proto-Germanic-gaz-y
8Proto-Indo-European-ḱos-y, -ic

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 -ḱos