See also: -issimo
- forms the absolute superlative
- Though both are called superlatives, Portuguese words suffixed with -íssimo are not equivalent to English words suffixed with -est or preceded by most. Instead, they are equivalent to using the adverbs very or extremely to qualify the adjective.
- Adjectives ending in -ável or -ível are suffixed with -abilíssimo or -ibilíssimo instead, replacing the suffix:
- Adjectives ending in m change it to n:
- Adjectives ending in -ão change it to -an:
- Adjectives ending in z change it to c:
- Adjectives ending in the semivowel followed by a vowel lose the semivowel, in nonstandard usage:
- Some words may loan the superlative from Latin in addition to forming one with this suffix:
- Colloquially, the syllable <ssi> may be repeated a number of times for emphasis:
- ^ 2009, Evanildo Bechara, Moderna Gramática Portuguesa, 37th edition, Editora Nova Fronteira, Editora Lucerna, page 154.