This is the 712th most frequent Catalan word.
estem
"Estem" means "we are" in English.
Here, 'estem' also serves as the first-person plural of 'estar', but in this case, it denotes a state of being ('happy').
Quan estem contents, tot sembla millor.
When we are happy, everything seems better.
In this sentence, 'estem' again is the first-person plural form of 'estar', and it is used to express a specific location.
Estem en un lloc tranquil ara mateix.
We are in a quiet place right now.
In this sentence, 'estem' is used as the first-person plural conjugation of the verb 'estar' in the present tense, indicating a continuous action ('studying').