Where does “self-sure” come from?

self-sure (English) comes from English sure, from Middle English sure, from Middle French sur, from Old French seür, from Latin super, from Latin eks-uper, from Proto-Indo-European upéri, from Proto-Indo-European upér.

Ancestry of “self-sure”, step by step

self-sure traces back through two separate lines of ancestry.

via English sure

StepLanguageWordMeaning
1EnglishsurePhysically secure and certain, non-failing,...
2Middle Englishsuresafe, protected; fortified, well-defended,...
3Middle Frenchsur
4Old FrenchseürAlternative form of seur; sure
5Latinsuper"accusative" above, on the top of, upon;...
6Latineks-uper
7Proto-Indo-Europeanupérialternative reconstruction of *upér
8Proto-Indo-Europeanupérabove; over
9Proto-Indo-Europeanupóunder, below
10Proto-Indo-Europeanh₃ewp-

via English Self

StepLanguageWordMeaning
1EnglishSelfHimself, herself, itself, themself, themselves; that specific (person mentioned)
2Middle EnglishsalveAlternative form of sauf
3Old Englishsealfsalve
4Proto-West Germanicsalbusalve, ointment
5Proto-Germanicsalbōsalve, ointment
6Proto-Indo-Europeansolp-éh₂
7Proto-Indo-Europeanselp-fat, oil
Every word from Proto-Indo-European h₃ewp-