A short stressed vowel doubles the final consonant (dik → dikker).
Use the comparative with dan (slimmer dan…) and the superlative with het (het slimste).
The comparative (vergrotende trap) of slim is slimmer. A short stressed vowel doubles the final consonant (dik → dikker). Use it with 'dan': ...slimmer dan...
The superlative (overtreffende trap) of slim is slimst, usually used as het slimste.
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