I didn't understand the reason for the delay. Did you hear?
mo-TI-vo — stress on second syllable. ha-SEN-ti-to — three syllables, stress on second.
Ask a fellow passenger when the driver announces a delay reason over the PA but the announcement was unclear or too fast to follow.
Non ho capito (I did not understand) — passato prossimo of capire. Il motivo del ritardo (the reason for the delay) — motivo (reason/motive). Ha sentito lei (did you hear) — formal Lei question using the passato prossimo of sentire.
Ha detto qualcosa sull'arrivo?
Did it say something about the arrival?
Ha detto (did it say) — asking about the content of the announcement
Sembra un guasto o uno sciopero?
Does it seem like a breakdown or a strike?
Guasto (breakdown) / sciopero (strike) — the two most common delay causes
L'app di Trenitalia cosa dice?
What does the Trenitalia app say?
Checking the app often provides more detail than the announcement
Italian train delay announcements are sometimes deliberately vague — the railway prefers not to commit to estimated resolution times until they have more information, which frustrates passengers but reduces further complaints.