This is the 1139th most frequent Spanish word.
deberían
"Should" or "ought to" (third-person plural conditional form of "deber").
In this sentence, 'deberían' expresses a suggestion or recommendation for action, indicating what is advisable for someone to do.
Deberían estudiar para el examen mañana.
They should study for tomorrow's exam.
Here, 'deberían' conveys a conditional recommendation based on the current situation, emphasizing that resting is an advisable action if one is tired.
Si están cansados, deberían descansar un poco.
If they are tired, they should rest a little.
In this case, 'deberían' suggests a consideration or thought process that is advisable to follow before making a decision.