Similar words
bate-papo
bate-papo is the native Portuguese term, an informal chat or conversation; chat is the English loanword, specifically for online or text chat.
Similar in other languages
German
Plauderei
Plauderei is the German word for the same thing — both mean "chat."
Practice
1 What does chat mean?
chat
2 Fill the gap: Entrou no ___.
Full sentence: Entrou no chat. (He joined the chat.)
3 Which fingerprint chart matches chat?
chat: neutral register, common frequency, general domain, neutral connotation.