What does "whomever" mean?

Whatever person or persons (as object of verb or preposition).

What is a synonym for "whomever"?

Common synonyms include: anyone, whoever, whomsoever, whosoever.

/humˈɛvɚ/ pron

pron ·Rare ·Advanced level

Pronoun

1
Whatever person or persons (as object of verb or preposition). formal
"The letter is addressed to whomever it may concern."

"You may invite whomever you like."

From Middle English whomever; equivalent to whom + ever.