muchísimoadverb

Muchísimo means very much or extremely in English. It is an adverb.

Extraño muchísimo a mi familia.

I miss my family very much.

Podemos hacerlo muchísimo mejor.

We can do so much better.

Te agradezco muchísimo tu ayuda.

I thank you very much for your help.

Disfruté muchísimo la película anoche.

I enjoyed the movie very much last night.