extremadamente
/eɡstɾeˌmadaˈmente/ · B1 · adv
extremely
extremada + -mente = extreme + -ly, so extremely
Spanish turns adjectives into adverbs by adding -mente to the feminine form: extremada + mente. The suffix comes from Latin mente, meaning with a mind, so it literally reads as with an extreme mind. Compare rápidamente (quickly).