Where does “unaddable” come from?

unaddable (English) comes from English addable, from English add, from Middle English adden, from Latin addō, from Latin -dō, from Proto-Germanic -dô, from Sicilian di, from Latin dē — afterwards, post; by, at.

Ancestry of “unaddable”, step by step

unaddable traces back through two separate lines of ancestry.

via English addable

StepLanguageWordMeaning
1EnglishaddableAlternative spelling of addible; Something that...
2EnglishaddTo join or unite so as to increase the number,...
3Middle Englishaddento join or unite (something with something else); to add
4Latinaddōto add
5Latin-dōto put
6Proto-Germanic-dô
7SiciliandiUsed to indicate possession, after the thing owned and before the owner; of; ’s
8Latinof; concerning; about
9Latinpostbehind; after, since, besides, except; behind,...
10Latinposteablative singular of postis
11Proto-Italicpostibehind, after
12Proto-Indo-Europeanpóstiafter
13Proto-Indo-Europeanpósafterwards, post; by, at

via English un

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