This is the 771st most frequent Serbian word.
будемо
"Будемо" means "we will be" in English.
The word 'будемо' here is a first-person plural form of the verb 'бити', used in a subjunctive/conditional construction to express necessity or intention about being diligent.
Треба да будемо вредни да бисмо постигли успех.
We need to be diligent to achieve success.
The word 'будемо' is used in the future subjunctive tense to indicate a future action dependent on a condition, namely, having time.
Када будемо имали времена, посетићемо музей.
When we have time, we will visit the museum.
In this sentence, 'будемо' appears in a clause expressing desire or wish, referring to the state of being honest.