Where does “ultrathinly” come from?

ultrathinly (English) comes from English thinly, from English thin, from Middle English thinne, from Old English þynne, from Proto-West Germanic þunnī, from Proto-Germanic þunnuz, from Proto-Indo-European ténh₂us, from Proto-Indo-European tenh₂- — to stretch, to extend.

ultrathinly (English): In an ultrathin manner

Definitions

  1. In an ultrathin manner

Ancestry of “ultrathinly”, step by step

ultrathinly traces back through two separate lines of ancestry.

via English thinly

StepLanguageWordMeaning
1EnglishthinlyIn a thin, loose, or scattered manner; scantily;...
2EnglishthinHaving little thickness or extent from one...
3Middle Englishthinnethin, narrow, skinny, slender; weak; sparse,...
4Old Englishþynnethin
5Proto-West Germanicþunnīthin
6Proto-Germanicþunnuzthin
7Proto-Indo-Europeanténh₂usthin
8Proto-Indo-Europeantenh₂-to stretch, to extend
9Proto-Indo-Europeanten-to stretch, to extend

via English ultra

StepLanguageWordMeaning
1EnglishultraExtreme; far beyond the norm; fanatical;...
2Latinultrābeyond
3Latin-asuffixed to the roots of verbs, forms agent...
4Proto-ItalicForms masculine agent nouns from prefixed or compounded bases
5Proto-Indo-European-éh₂
Every word from Proto-Indo-European ten-Every word from Proto-Indo-European tenh₂-Every word from Proto-Indo-European ténh₂us