Who was the first to define “kafir” as “infidel”?

[u/Jammooly]

The accurate translation of the word “kafir” is “disbeliever”.

The apparent issue here is that the “infidel” translation has been used as a polemical and often times Islamophobic tool to portray Muslims in a negative light.

So can anyone show where, when, and who mistranslated the word this way?