Where does “tester” come from?

tester (French) comes from French test, from English Test, from German testen, from German Test, from English test, from Middle English teste, from Old French teste, from Latin testis — to stand.

tester (French): to test; to write one's will

Definitions

  1. to test; to write one's will

Ancestry of “tester”, step by step

tester traces back through two separate lines of ancestry.

via French test

StepLanguageWordMeaning
1Frenchtesttest, a cupel or cupelling hearth in which...
2EnglishTesta Test match
3Germantestento test
4GermanTesttest; melting pot
5EnglishtestA challenge, trial; A cupel or cupelling hearth...
6Middle Englishteste—
7Old Frenchtestehead
8Latintestiswitness; one who testifies or attests; testicle
9Latinterstis—
10Latintrīstissad, unhappy, melancholy, morose
11Proto-Indo-Europeantristh₂sa third party standing, after the two parties to...
12Proto-Indo-Europeansteh₂-to stand

via Latin testor

StepLanguageWordMeaning
1LatintestorI am witness, testify, attest; I make a will
2Latin-ōsuffixed to nouns or adjectives. Originally a-stem nouns. Later extended to nouns with other stems. Forms regular first-conjugation verbs
3Proto-Indo-European-ōDerives nouns from roots

Words derived from “tester”

Every word from Proto-Indo-European steh₂- →Every word from Proto-Indo-European tristh₂s →Every word from Latin trīstis →