This is the 7214th most frequent Dutch word.
beloofden
"Promised" (past tense plural of "beloven").
'Beloofden' is used here in the past tense to indicate a promise made by plural subjects, referring to their intention.
Zij beloofden om morgen op tijd te zijn.
They promised to be on time tomorrow.
Here, 'beloofden' signifies a commitment made in the past by the children to perform an action.
De kinderen beloofden om hun kamer schoon te maken.
The children promised to clean their room.
'Beloofden' describes a past action of making a promise involving 'we' as the subject and the intention to provide assistance.