Italian

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Etymology

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From famoso +‎ -issimo.

Adjective

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famosissimo (feminine famosissima, masculine plural famosissimi, feminine plural famosissime)

  1. superlative degree of famoso (very famous)

Latin

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Adjective

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fāmōsissimō

  1. dative/ablative masculine/neuter singular of fāmōsissimus