them · pronoun /ðem/Full view
them (GROUP)
A1 used after a verb or preposition to refer to a group of people, animals, or things that have already been talked about
Dictionary example:

I've lost my keys. I can't find them anywhere.

Learner example:

S[ay] hello [to] your wife and children. I will have presents for them. (Skills for Life (Entry 1); A1; Portuguese)

them (TO AVOID HIM/HER)
B1 used after a verb or preposition to refer to a person when you want to avoid saying "him" or "her" or when you do not know if the person is male or female
Dictionary example:

When each passenger arrives, we ask them to fill in a form.

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