This is the 178th most frequent Spanish word.
sigue
"Follow" or "continue."
The word 'sigue' is used as an imperative form here, encouraging someone to continue a certain action.
Sigue estudiando para el examen.
Keep studying for the exam.
In this sentence, 'sigue' is employed to express that the subject maintains a certain state or situation, specifically their interest.
Él sigue interesado en aprender español.
He remains interested in learning Spanish.
Here, 'sigue' conveys the idea of continuity of an action or state, indicating the train continues its operation despite the weather.