Where does “strawbreadth” come from?

strawbreadth (English) comes from English breadth, from Middle English bredthe, from Middle English brede, from Old English bred, from Old English -en, from Old Norse -inn, from Proto-Norse -īna-, from Proto-Germanic -īnaz — adjectival suffix.

Ancestry of “strawbreadth”, step by step

strawbreadth traces back through two separate lines of ancestry.

via English breadth

StepLanguageWordMeaning
1EnglishbreadthThe extent or measure of how broad or wide...
2Middle Englishbredthebreadth
3Middle EnglishbredeAlternative form of breiden; Alternative form of...
4Old Englishbredsurface; plank, board; table, tablet
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 straw

StepLanguageWordMeaning
1EnglishstrawA dried stalk of a cereal plant; Such dried...
2Middle EnglishstrawThe remaining plant material after cultivation;...
3Old Englishstrēawstraw
4Proto-West Germanicstraustraw
5Proto-Germanicstrawąstraw
6Proto-Indo-Europeanstrew-to spread, to strew
7Proto-Indo-Europeansterh₃-to spread, extend, stretch out
8Proto-Indo-Europeanster-sterile, infertile
Every word from Proto-Indo-European -no-