Where does “unfailingly” come from?

Unfailingly derives from English failing, which comes from English fail, ultimately from Latin fallo meaning "to deceive or disappoint."

unfailingly (English): Without fail; reliably; always

Definitions

  1. Without fail; reliably; always

Ancestry of “unfailingly”, step by step

StepLanguageWordMeaning
1Englishunfailinginexhaustible; changeless; infallible
2EnglishUn-not
3EnglishstillNot moving; calm; Not effervescing; not...
4Old Englishstillanbecome calm, abate, subside; calm, pacify,...
5Proto-West Germanicstillijanto make still, quiet
6Proto-West Germanic-janCreates denominative verbs from nouns; Creates...
7Proto-Germanic-janąDerives denominatives from nouns and factitives...
8Proto-Indo-European-yétiCreates intransitive, often deponent,...
9Proto-Indo-Europeanyé-
10Chichewaiyehe, she
Every word from Chichewa iye