1. Any person whatever.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• whicever,
• whowever,
• whtever,
• whenver,
• wotever,
• hoever,
• hhowever,
• wheenver,
• whoeevr,
• hoeever,
• hoewver,
• whomeever,
• wheer,
• whover,
• wheher,
• whomeve,
• wiever,
• whaever,
• wenever,
• hwever

• whiffer,
• whipper,
• whopper,
• whooper.

The adjective form of the word "whoever" is "whichever".

The plural form of "whoever" remains "whoever" as it is an indefinite pronoun and does not change in form.

The singular form of "whoever" is "whoever". "Whoever" is an indefinite pronoun used to refer to any person or people, regardless of gender or number.