English
grimester
From grime + -ster.
Formed from grime + -ster
Proto-Indo-European *gʰer- ‘to rub, stroke’
…
Proto-Germanic *grīmô ‘mask’
Proto-West Germanic *grīmō ‘mask’
Old English grīma ‘mask’
Middle English grim ‘dirt or soot covering the face’
English grime
Today it means
noun One who is disgusting or insidious.
Language periods are conventional ranges, not dates for this word.
Etymograph / grimester