"Are the women at home?"
Translation:Suntne feminae domi?
"Est" is the verb "to be", present tense, in the third person singular ("he/she/it is"), and "sunt" is the same in the third person plural ("they are").
The suffix "-ne" is stuck on the first word of the sentence to indicate it's a yes/no question. What I'm wondering is if any word can go first in the sentence and get the "-ne" stuck on it. After all, we're always told Latin word order was very flexible.