1.

obstinate

Obstinacy is a character trait companies like to see in their employees.

Maria is so obstinate, she takes home every stray kitten she finds.

My friend does not like to be pushed around, and when someone tries to give him orders, he tends to become obstinate.

2.

diligent

The student worked hard on the difficult assignment, and his diligence paid off in the end because the teacher gave him high praise.

The professor was so diligent that he constantly misplaced his glasses.

Diligent to a fault, he could not pass a panhandler without giving him some money.

3.

intrepid

Intrepid cats hide as soon as they hear a visitor enter the house.

She was too intrepid to donate anything when the Girl Scouts came to the door.

Race car drivers must be intrepid because they are always in danger of a serious accident.

4.

extroverted

Extroverts are too shy to talk about personal problems.

My extroverted roommate likes to spend days in the library without talking to anyone.

Extroverts have a distinct advantage on the campaign trail.

5.

callous

Callous people don't mind if they have to fire someone.

A callous boss has a hard time firing anyone.

My sister has always been callous and ready to share.

6.

altruistic

The truly altruistic demand more of themselves than of others.

Philosophers debate to the present day if people are by nature selfish or altruistic.

Altruism and callousness go hand in hand.

7.

lethargic

Even after an exhausting day at work, my lethargic husband will not slow down and often starts fixing things in the house.

When a pet stops eating and becomes lethargic, it may be seriously ill and you should bring it to a vet.

The commentator was feared for her lethargic tongue.

8.

introverted

Salespeople need to be introverted because they must be able to make a positive impression on all kinds of people in a very short time.

The introverted boy did not notice that his classmate made several attempts to become his friend.

Introverts usually exhibit abnormal behavior.

9.

insolent

I always believed that insolence toward subordinates was unforgivable because they cannot answer rudeness with rudeness.

His father's death left him completely insolent.

During the divorce proceedings, the husband claimed to be insolent and unable to pay child support.

10.

blasé

I sat next to someone on the train who was so blasé that she did not put her cell phone down for the entire ride.

The blasé enjoy nothing more than good food.

He tried to hide his insecurity behind a blasé expression.