To be by yourself on purpose is to be alone.

The expression of not caring about something is feeling that anything is possible "whatsoever".

To physically bend down in fear is to cower. 

Something that is totally unexpected was unannounced. 

A person known to have incredible knowledge of a specific subject is called a connoisseur.

To be part of a special group or club is in the clique.

To approve of someone or something on a massive scale is to vote for it.

Up to a particular moment of time before the future is called as "yet".

Someone acquiring enormous property, money or knowledge is said to possess great wealth.

A formal medical examination of a body is an autopsy.