He was left in a state of friendless isolation.

He swore never to make the same mistake again from that bad experience.

He is fed up with that job.

My pet is a collie.

Vietnamese is one of the isolating languages, where the order of words is very important.

Considering his health, I recommended moderate exercise.

He needs to worry about his health.

He was demotivated by his failure and decided never to get involved in that business again.

He is showing symptoms of melancholia.

Korumbia is my best friend.