Final answer:
The Spanish word equivalent to [to sleep] is 'dormir.' It is used to describe the action of sleeping in Spanish.
Step-by-step explanation:
The word in Spanish that is equivalent to [to sleep] is dormir. In the given sentence, 'No puedo dormir porque estoy nerviosa por el examen de mañana,' it means 'I cannot sleep because I am nervous about tomorrow's exam.' This verb is commonly used to describe the action of sleeping in Spanish.
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