Nervous and uncomfortable because you are worried about what people think about you and your actions.

Healthy
(also means sincere, warmhearted)

Even though, although.

Unsupportable, not able to be maintained or defended

Fast, lively, energetic

Sharp, cutting (remark, comment)

Field or domain. Kingdom.
A particular area of knowledge, experience, interest, etc.

Relatively expensive and designed to appeal to affluent consumers.

To arrive somewhere in order to join a group of people, especially late or unexpectedly

To prevent a person or organization from having or being able to take part in something.
To prevent someone from coming into a room or building by locking the door

To be doing something