Able to do something.

"He is not capable of lifting heavy objects."

Disagreeing with a popular opinion.

"The dissident magazine was banned because of its controversial content."

Accidental or unintentional.

"I made an inadvertent mistake on my test."

Promising or hopeful.

"The musician's hit song was an auspicious start to her career."

To ease pain.

"This medicine will alleviate your headache."

Feeling or showing no emotion.

"I feel apathetic about classical music; I neither like it nor dislike it."

Large in scope or content; having a wide variety.

"My history class is very comprehensive; we discuss many different cultures."

Given freely without being earned or needed.

"I did not like the film's gratuitous violence; it was unnecessary."

Very serious or meaningful.

"The documentary had a very profound message about civil rights."

Very hard-working.

"She was a diligent student who studied every night."

Doubtful or disbelieving.

"I was dubious when my friend claimed to have tamed a lion."

Current or modern; from the same time.

"Bob Dylan is a contemporary of The Beatles; they were both popular in the 1960s."

Hidden or not easily seen.

"I tried to be inconspicous when I came into class, hoping that the teacher would not see me."

Unable to be heard.

"My voice was inaudible over the sound of the jet plane."

Indirect.

"I took a circuitous route to avoid traffic."