MY VOCAB PRACTICE:

1. strict
   His father was a very strict person after he returned from the war.

2. constraint
   He felt constraint of the circumstances that were surrounding him.

3. restrict
   After he got a bad grade at school, his parents restricted his access on the internet.

4. strenuous
   The strenuous workout was not a good idea after he suffered a mild heart attack.

5. astringent
   It had a fresh astringent taste, very dissolvable in water, but hardly soluble in alcohol.