Where does “unflattenable” come from?

unflattenable (English) comes from English flattenable, from English flatten, from English -en, from Middle English -en, from Old English -en, from Old Norse -inn, from Proto-Norse -īna-, from Proto-Germanic -īnaz — adjectival suffix.

unflattenable (English): Not flattenable

Definitions

  1. Not flattenable

Ancestry of “unflattenable”, step by step

unflattenable traces back through two separate lines of ancestry.

via English flattenable

StepLanguageWordMeaning
1EnglishflattenableCapable of being flattened
2EnglishflattenTo make something flat or flatter; To press one's...
3English-enDenotes the past participle form when attached to...
4Middle English-enDenotes the past participle form when attached to...
5Old English-enmæġþ + API → mæġden; cocc + API → cycen, cicen;...
6Old Norse-innUsed to create adjectives from nouns, meaning...
7Proto-Norse-īna-
8Proto-Germanic-īnaz-en
9Proto-Indo-European-iHnosCreates adjectives of materials
10Proto-Indo-European-no-adjectival suffix

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European -no-