Add -er for the comparative and -st for the superlative.
Use the comparative with dan (kouder dan…) and the superlative with het (het koudste).
The comparative (vergrotende trap) of koud is kouder. Add -er for the comparative and -st for the superlative. Use it with 'dan': ...kouder dan...
The superlative (overtreffende trap) of koud is koudst, usually used as het koudste.
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