This is the 3447th most frequent Catalan word.
fem
"Fem" in Catalan means "manure" or "dirt."
In this sentence, 'fem' is the verb meaning 'we do' or 'we make' in the present tense, indicative mood.
Nosaltres fem una excursió.
We are doing a hike.
In this sentence, 'fem' is a noun meaning 'waste' or 'manure' depending on context.
El fem que recollim serà reciclat.
The waste we collect will be recycled.
Again, 'fem' represents the verb 'we make' or 'we do' in the present tense.