A compound adjective is an adjective made up of two or more words, in which either of those words can be a noun, an adjective, an adverb, a verb in their past participle form or a verb in their present participle form. This type of adjectives words may be joined by a hyphen or they may not like the "sourdough" word, which it's a compound adjective made up of the adjective "sour" and the noun "dough", that describes the noun "bread."
WOW, look ath that increadable amount of snow piled up outside. That snow is so deep it makes the depth of the atlantic look like a crack in the road. i guess