Comparative form: more frosty; colder, icier, or having more frost than something else.
The comparative form of 'frosty,' created by adding '-er' to the adjective. This follows standard English rules for comparing adjectives of one or two syllables (cold → colder, pretty → prettier).
English lets us compare almost any adjective by adding '-er' for two-syllable words or more for longer words—'frostier' instantly means 'more frosty,' but try saying 'refrigerater' and you see why we use 'more refrigerated' instead!
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