This is the 2365th most frequent Catalan word.
mengen
"Mengen" is the third-person plural present indicative form of the verb "menjar," meaning "they eat."
In this sentence, 'mengen' is the verb which means 'eat'. It is in the third person plural present tense form, referring to the children.
Els nens mengen pomes.
The children eat apples.
Here, 'mengen' again refers to the third person plural present tense, indicating an action performed by an unspecified group implied in the context.
Quan mengen massa, se senten pesants.
When they eat too much, they feel heavy.
In this case, 'mengen' applies to animals as subjects, denoting their habitual action of eating during nighttime.