This is the 6863rd most frequent Spanish word.
debi
"Debí" means "I should have" or "I ought to have" in English.
Here, 'debí' is used to express a regret or missed obligation in the past.
Debí terminar mi tarea antes de salir.
I should have finished my homework before going out.
In this sentence, 'debí' implies an unfulfilled necessity or suggestion in the past tense.
Cuando era niño, debí aprender a nadar.
When I was a child, I should have learned to swim.
This usage of 'debí' conveys a past action that the speaker realizes would have been beneficial.