What is the meaning of -men?

plural of -man

sense, capacity

Forming nouns expressing an action

forms neuter nouns of the third declension, generally with senses along the lines of 'a means of doing something'

Classifier suffix used to form the numerals used to count animate nouns

Indefinite suffix for animate nouns

Forms adverbs from feminine adjectives. -wise, -ly

Alternative form of -ment

Forms agent nouns from verbs, denoting professions. -er, -ant

Forms nouns and adjectives from verbal roots.

Forms nouns and adjectives denoting a high degree or excess.

Forms nouns and adjectives denoting fondness and passion.

Forms nouns of communities.

Source: wiktionary.org