Italian

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Etymology

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From glorioso +‎ -issimo.

Adjective

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gloriosissimo (feminine gloriosissima, masculine plural gloriosissimi, feminine plural gloriosissime)

  1. superlative degree of glorioso (very glorious, very illustrious)

Latin

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Adjective

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glōriōsissimō

  1. dative/ablative masculine/neuter singular of glōriōsissimus