How to Say "extremely beautiful" in Spanish
The Spanish word for “extremely beautiful” is “bellísimo” — A1 level. This is a very common word in everyday Spanish.

Examples
El amanecer en la costa es bellísimo.
The sunrise on the coast is extremely beautiful.
He comprado un cuadro bellísimo para el salón.
I bought a gorgeous painting for the living room.
Fue un gesto bellísimo invitar a toda la familia.
It was a truly beautiful gesture to invite the whole family.
The 'Extreme' Suffix
Adding '-ísimo' to the end of an adjective is like adding 'extremely' or 'super' before it in English. It creates the strongest possible version of that word.
Matching the Gender
Since this word describes something, it must match it. Use 'bellísimo' for masculine words (un libro) and 'bellísima' for feminine words (una casa).
Avoid 'Muy'
Mistake: “muy bellísimo”
Correction: just 'bellísimo' or 'muy bello'
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