Where does “undrillable” come from?

undrillable (English) comes from English drillable, from English drill, from Middle Dutch drillen, from Old Dutch thrillen, from Proto-Germanic þriljaną, from Proto-Indo-European ter-, from Italian termine, from Latin terminus — boundary, end.

undrillable (English): Not drillable

Definitions

  1. Not drillable

Ancestry of “undrillable”, step by step

undrillable traces back through two separate lines of ancestry.

via English drillable

StepLanguageWordMeaning
1EnglishdrillableSuitable for being drilled through
2EnglishdrillTo create by removing material with a drill; To...
3Middle Dutchdrillenbore, move in a circle
4Old Dutchthrillen
5Proto-Germanicþriljaną
6Proto-Indo-Europeanter-tender, weak; young creature
7Italiantermineend, close; limit, term, date, time; term, word
8Latinterminusa boundary, limit, end
9Proto-Italictermenos
10Proto-Indo-Europeantérmn̥boundary, end

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European térmn̥