Etymograph

English

Scotchgard

Brand name: a modified spelling of Scotch + guard.

A compound of Scotch + guard

Old French coche ‘notch’

Middle English scocchen ‘to cut’

English Scotch

Proto-Germanic *wardāną ‘to guard, protect’

…

Early Medieval Latin wardō

Old French guarder ‘to protect, guard’

Old French guarde ‘protection; guard’

Middle English garde ‘guardianship’

English guard

The story

Brand name: a modified spelling of Scotch + guard.

Today it means

name A stain repellent and water repellent for use on furniture, carpets, etc.

Language periods are conventional ranges, not dates for this word.

Etymograph / Scotchgard