This is the 2690th most frequent Polish word.
czekały
"Waited" (third-person plural, past tense).
The word 'czekały' here indicates waiting for an object or event, explained for a group of female members.
Dziewczyny czekały na autobus.
The girls were waiting for the bus.
In this usage, 'czekały' personifies objects (letters) as if they were waiting, indicating their availability.
Te listy czekały na Ciebie od tygodnia.
These letters waited for you for a week.
Here, 'czekały' applies to female passengers, involving human anticipation or expectation.