For casual conversation:
* സംസാരിക്കുക (samsarikkuka) - This is the most general word for "to talk" and can be used for casual conversation.
* പാർലി (parli) - This is a slang term for "to chat" or "to talk" in a casual way.
* കുശലം പറയുക (kusthalam parayuka) - This means "to ask how someone is doing" and is often used as a way to start a casual conversation.
For online conversation:
* ചാറ്റ് (chat) - This word is commonly used for online conversation and is understood by most Malayalis.
* ഓൺലൈൻ സംഭാഷണം (online sambhashanam) - This means "online conversation" and is a more formal term.
The best word to use will depend on the specific context of the conversation.
For example, if you are talking about having a casual conversation with a friend, you could use "samsarikkuka" or "parli." If you are talking about an online conversation, you could use "chat" or "online sambhashanam."