Where does “ultradurable” come from?

ultradurable (English) comes from English durable, from Middle English durable, from Latin durabilis, from Latin duro, from Latin durus, from Proto-Indo-European drew-, from Proto-Indo-European dóru, from Proto-Indo-European deru- — firm, solid; wood; be firm, hard, solid.

ultradurable (English): Extremely durable

Definitions

  1. Extremely durable

Ancestry of “ultradurable”, step by step

ultradurable traces back through two separate lines of ancestry.

via English durable

StepLanguageWordMeaning
1EnglishdurableAble to resist wear, decay; lasting; enduring; A...
2Middle Englishdurable
3Latindurabilisdurable, lasting
4Latindurodative masculine singular of dūrus; dative neuter...
5Latindurushard, rough; harsh; hardy, vigorous
6Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree
7Proto-Indo-Europeandórutree
8Proto-Indo-Europeanderu-firm, solid; wood; be firm, hard, solid

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 deru-Every word from Proto-Indo-European drew-Every word from Proto-Indo-European dóru