Where does “unalertable” come from?

unalertable (English) comes from English alertable, from English Alert, from French alerte, from Italian all'erta, from Italian erta, from Italian erto, from Latin ērectus, from Latin ērigō — to straighten, to right oneself; right; just.

unalertable (English): Not alertable; unresponsive to attempts to alert

Definitions

  1. Not alertable; unresponsive to attempts to alert

Ancestry of “unalertable”, step by step

unalertable traces back through two separate lines of ancestry.

via English alertable

StepLanguageWordMeaning
1EnglishalertableCapable of receiving and responding to notifications from other threads of execution
2EnglishAlertthe northernmost permanently inhabited place in the world
3Frenchalertealert; agile; first-person singular present...
4Italianall'ertaAlternative spelling of allerta; to the height
5Italianertafeminine singular of erto; steep slope
6Italianertosteep
7Latinērectuserected, made upright, raised, having been set up
8Latinērigōto raise up, elevate, lift
9Latinregōto rule, govern, direct
10Proto-Italicregō
11Proto-Indo-Europeanh₃réǵetito be straightening, to be setting upright
12Proto-Indo-Europeanh₃reǵ-to straighten, to right oneself; right; just

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European h₃reǵ-Every word from Proto-Indo-European h₃réǵetiEvery word from Proto-Italic regō