The word desayuna is the present form of desayunar in the third person singular. There are other translations for this conjugation.
See the full desayunar conjugation

desayunar

O mejor aún, ¿por qué no desayuna conmigo?
Or better still, why don't you have breakfast with me?
Bueno, aquí es donde Raymond desayuna todas las mañanas.
Well, this is where Raymond eats breakfast every morning.
Mi padre lee el periódico mientras desayuna.
My father reads the newspaper while he eats breakfast.
Respira... y desayuna en la cama conmigo.
Breathe... and have some breakfast in bed with me.
Mi marido desayuna mientras lee el periódico.
My husband has his breakfast while reading the newspaper.
Mi marido lee el diario mientras desayuna.
My husband reads the newspaper while eating breakfast.
Mi marido desayuna leyendo el periódico.
My husband has his breakfast while reading the newspaper.
El último en bajar las escaleras no desayuna.
The last one to get downstairs gets no breakfast.
Gabriel escucha la radio mientras desayuna.
Gabriel listens to the radio while eating breakfast.
Entonces, ¿qué desayuna la gente de Polonia?
So what do people from Poland have for breakfast?
La familia desayuna en el balcón.
The family eats breakfast on the balcony.
No lo creo, desayuna en su cuarto.
I shouldn't think so. She has breakfast in her room.
La familia desayuna en el balcón.
The family is eating breakfast on the balcony.
No desayuna, entonces pica todo el día.
You don't breakfast, then you nibble all day.
Daniel desayuna a las seis todas las mañanas.
Daniel eats breakfast every morning at six o'clock.
Al menos quédate y desayuna algo.
At least stay and have some breakfast.
Siéntate y desayuna algo por una vez.
Sit down, eat some breakfast for once.
Catherine, date prisa y desayuna.
Catherine, hurry up and eat your breakfast.
Entra y desayuna con nosotros.
Come in and have breakfast with us.
¿Y su marido lo lee mientras desayuna?
And your husband reads it at breakfast?
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