Using Context Clues!

"Precipitation", such as rain and snow, falls from the sky.

 Candles, flashlights, and lamps "illuminate" the room. 

After being ill and unable to eat for three days, Beverly had a "voracious" appetite.

His "rancor", or hatred, of his brother has caused him to live his life as a lonely person.

The good guy in the story was strong and kind, unlike the "villain".

Some people feel "perplexed" by brain teasers, while others figure them out quickly.

Jack "labored" at his job all day while Peggy rested in bed.

Katie appeared "infallible" in math class because she had never gotten a problem wrong. 

The sun made the lake water "shimmer".

A "sleuth", such as Sherlock Holmes, can be very helpful in solving crimes.

The tornado "annihilated" the whole town to the point that nothing was left standing. 

The mother was determined to prove her son's innocence; the father was "resolute" as well.