This is the 9002nd most frequent Polish word.
spałem
"I slept."
The word "spałem" here is the masculine singular past tense form of the verb "spać" (to sleep), indicating that the speaker, a male, had slept during the stated time frame in the past.
Spałem bardzo długo w sobotę.
I slept for a very long time on Saturday.
Here, the word "spałem" is used in an interrogative sentence asking about the duration of sleep, again in the masculine singular past tense form.
Czy spałem wystarczająco długo, żeby mieć siłę na cały dzień?
Did I sleep long enough to have strength for the whole day?
In this usage, "spałem" indicates the action of sleeping at a specific moment in past time, demonstrating an ongoing action during an event that occurred.