Marking

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Old English mearc, gemerce (noun), mearcian (verb), of Germanic origin; from an Indo-European root shared by Latin margo ‘margin’.

wiktionary

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From Middle English marking, merking, merkunge, from Old English mearcung, from Proto-West Germanic *markungu, equivalent to mark +‎ -ing.

marking

etymonline

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marking (n.)

Old English mearcung (Anglian mercung) "action of making marks, branding; mark, pattern of marks, characteristic; constellation," verbal noun from mark (v.). Related: Markings.