Three Latin roots describe the body’s basic needs. viv (also vit) means “live” or “life”: a vivid color is full of life, and to survive is to live on. vor means “eat”: a carnivore eats meat and an herbivore eats plants. somn means “sleep”: insomnia is not being able to sleep.
Key idea
viv, vit = life, live. vor = eat. somn = sleep (and a related word, sopor, means deep sleep).
These roots often describe people, not just bodies. A convivial host loves living it up together with friends. A voracious reader devours books. A somnolent afternoon makes everyone drowsy, and a soporific speech puts listeners to sleep.
The parts and their words
Words taken apart
| Word and meaning | Parts, and what they say |
|---|---|
| revive to bring back to life or use | re- again + viv live + -e → “live again” |
| convivial friendly and lively; fond of good company | con- together + viv live + -ial → “living (feasting) together” |
| vivid bright and lively | viv life + -id → “full of life” |
| voracious wanting great amounts of food or of an activity | vor eat + -acious → “eating greedily” |
| carnivore an animal that eats meat | carn meat + vor eat + -e → “meat-eater” |
| somnolent sleepy; drowsy | somn sleep + -olent → “sleepy” |
| insomnia trouble falling or staying asleep | in- without + somn sleep + -ia → “without sleep” |
| soporific tending to cause sleep | sopor deep sleep + -ific making → “sleep-making” |
Worked example: Use the parts
The warm room and the long, slow lecture were soporific; half the class nodded off. What does the word mean?
- Take it apart: sopor (deep sleep) + -ific (making, as in horrific, which makes horror).
- Literally: “sleep-making.”
- The sentence fits: half the class nodded off.
Answer: Tending to cause sleep.
Meet the words
Common mistake
soporific does not contain somn; it comes from a related Latin word, sopor (deep sleep). And voracious is used for any huge appetite, not just for food: a voracious reader devours books.