English
filterman
From filter + -man.
Formed from filter + -man
Proto-Indo-European *pel-
Proto-Germanic *fellą ‘skin, hide’
Proto-West Germanic *felt
Medieval Latin filtrum ‘felt’
Middle English filtre
English filter
Today it means
noun A man employed to manage a physical process of filtration.
Language periods are conventional ranges, not dates for this word.
Etymograph / filterman