# 37

VOCAB C 37-40 TTMystery (N.)Mysterious (Adj.)Mysteriously (Adv.)

Mystery (N.)

>> Something is very strange / difficult to explainEx. It was a mystery that she disappeared from

her home.

Mysterious (Adj.), Mysteriously (Adv.)

Ex. She disappeared mysteriously but some people said that she died of a mysterious illness.

# 38

• Rigidity (N.)• Rigid (Adj.)• Rigidly (Adv.)

Rigidity (N.)

>> Not easy to blend or change ,≠ FlexiblilityEx. They are using metal framework because of

its rigidity.

Rigid (Adj.)

Ex. The leader is very rigid in his idea.

Rigidly (Adv.)

Ex. She rigidly opposed to all other people’s idea.

# 39

• Security (N.)• Secure (V.)• Secure (Adj.) ---> Insecure (Negative)

Security (N.) ,Secure (V.)

Ex. We hired 10 security guards to secure the bank during the weekend.

Secure (Adj.)--> Insecure

* Insecure (Negative)>> UnstableEx. I feel insecure if you are

not by my side.

# 40

• Necessity (N.)• Necessitate (V.)• Necessary (Adj.)• Necessarily (Adv.)

Necessity (N.)

Ex. The research emphasizes the necessity of having 3 meals a day.

Necessitate (V.)

>> To make something to be neededEx. A doctor’s appointment necessitated my

cancelling the class.

Necessary (Adj.)

Ex. It is necessary to brush your teeth after each meal.

Necessarily (Adv.)

Ex. Many rumors are not always necessarily true.