This is the 440th most frequent Croatian word.
nismo
"We are not."
'Nismo' is used as the negation of 'smo', indicating the negative form of the present perfect tense for 'we'.
Nismo bili kod kuće cijeli dan.
We were not at home the whole day.
In this sentence, 'nismo' serves as the auxiliary verb in the negative form to create the perfect tense for the plural subject 'we'.
Mi nismo obavili sve zadatke.
We did not complete all the tasks.
Here, 'nismo' is the negative form of the verb 'jesmo', used to indicate a state of being in the first person plural.