гриж

Not entirely certain. Bulgarian Etymological Dictionary favours a borrowing from Italian grigio (“gray”).

• IPA^(key): [ɡriʃ]

гриж • (griž) m (dialectal)

1. coarse woolen fabric (typically used for winter clothing)

• гри́жка (grížka, “coarse upper garment”)
• гри́жници (grížnici, “coarse trousers”)

• “гриж”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
• Nayden Gerov (1895) “гри́шка”, in Рѣчникъ на Блъгарскꙑй язꙑкъ. Съ тлъкувание рѣчи-тꙑ на Блъгарскꙑ и на Русскꙑ. [Dictionary of the Bulgarian language]‎ (in Bulgarian), volume 1, Plovdiv: Дружествена печꙗтница "Съгласие.", page 247
• Georgiev, Vladimir I., editor (1971), “гриж”, in Български етимологичен речник [Bulgarian Etymological Dictionary] (in Bulgarian), volumes 1 (А – З), Sofia: Bulgarian Academy of Sciences Pubg. House, →ISBN, page 281