If your little brother quietly obeys your instructions and waits for you at the food court while you and your friends wander around the mall, he's probably a tractable child, meaning he's obedient, flexible, and responds well to directions.

Root word : BENE or BEN

These ROOT-WORDS  BENE & BEN  means WELL & GOOD.

List of examples:

1) Benediction : a good blessing in a religious service

2) Benefactor : a good person who offers help or donates money

3) Beneficial :  having a good outcome; favourable

4) Beneficiary : a person who receives something good from someone else such as an inheritance

5) Benefit : to gain or receive good results from something

6) Benevolent : kind; good-hearted

7) Benign : favourable; having a good effect; not harmful

8) Bonafide : in good faith; authentic; genuine; real