Where does “unsummable” come from?

unsummable (English) comes from English summable, from English sum, from Khmer ស, from Chinese 蘇, from English Sue, from Middle English seuen, from Anglo-Norman suer, from Old French sivre — to follow; to see; to say.

unsummable (English): Not summable

Definitions

  1. Not summable

Ancestry of “unsummable”, step by step

unsummable traces back through two separate lines of ancestry.

via English summable

StepLanguageWordMeaning
1EnglishsummableAble to be summed (able to be added); that is, able to be summed up (able to be added up); thus
2EnglishsumA quantity obtained by addition or aggregation;...
3Khmerwhite
4Chinese
5EnglishSueA Mary Sue
6Middle Englishseuen
7Anglo-Normansuernominative singular of seror; to dry
8Old Frenchsivreto follow
9Vulgar Latinsequereto follow; second-person singular future active...
10LatinsequorI follow, come or go after
11Proto-Italicsekʷōrfollow, come/go after
12Proto-Indo-Europeansékʷetorto be following
13Proto-Indo-Europeansekʷ-to follow; to see; to say

via English un

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