This is the 3417th most frequent Portuguese word.
jantar
"Dinner" or "to have dinner."
Here, 'jantar' is used as a verb meaning 'to have dinner.'
Eu vou jantar com minha família hoje à noite.
I am going to have dinner with my family tonight.
In this instance, 'jantar' functions as a noun referring to the evening meal.
O jantar está servido na mesa.
The dinner is served on the table.
Here, 'jantar' is used as an infinitive verb in a phrase meaning 'having had dinner.'