Where does “authenticator” come from?

Authenticator derives from English authentic, from Latin authenticus, from Ancient Greek αὐθεντικός, formed with the suffix -ικός from αὐτός meaning self.

authenticator (English): One who authenticates; A feature that shows...

Definitions

  1. One who authenticates; A feature that shows...

Ancestry of “authenticator”, step by step

authenticator traces back through two separate lines of ancestry.

via English authenticate

StepLanguageWordMeaning
1EnglishauthenticateTo render authentic; to give authority to, by the...
2English-atehaving the specified thing; characterized by the...
3English-cyUsed to form nouns of state, condition or quality...
4Anglo-Norman-cie
5Latin-tiaoffice, rank
6Latin-iaUsed to form a feminine abstract noun, usually...
7Latin-iusforming adjectives from nouns; nominative neuter...
8Proto-Italic-jōsForms comparative adjectives
9Proto-Indo-European-yósCreates adjectives from noun or verb stems

via English ‐or

StepLanguageWordMeaning
1English‐orCreates an agent noun, often from a verb, indicating a person or object (often machines or parts of them) that do the verb or part of speech with which they are formed
2Middle English-our
3Old French-eorAlternative form of -or
4Latin-ator-ator, -er; second-person singular future passive...
5Latin-tor-er
6Proto-Italic-tōrForms agent nouns to verb stems
7Proto-Indo-European-tōrDerives agent nouns from verbs, denoting someone...
8Proto-Indo-European-tor-s
Every word from Proto-Indo-European -yós
authenticator — Etymology, Origin & Word History | Etymology Explorer