Final answer:
The underlined word 'noventa' means 'ninety' in English.
Step-by-step explanation:
The underlined word in the sentence 'La abuela de mi amiga tiene noventa años' means 'ninety' in English. The sentence is saying 'The grandmother of my friend is ninety years old.' The word 'noventa' in Spanish represents the number 90, which is equal to 'ninety' in English.
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