Mollify means to soothe someone's angry temper;to make less severe or intense.
David saw another kid at the park. David decided to try an mollify the boy's angry temper and soothe him.
David was a very officious person. He was helpful, but sometimes too much. The boy decided to walk home with him because David insisted on figuring out why he was angry.
Officious means too helpful; overly forwarding in wanting to assist.
Quintessential means a characteristic of that wish is pure, perfect, concentrated.
When they arrived to the boy's house the boy complimented David's quintessential personality. He was a pure and concentrated person.
Pander means to try to appeal/satisfy ones desires or wishes.
As David walked home he pandered and try to think of way to help his friends reach his dreams.
When David arrived in his room at home he noticed his room smelled rancid. It had a bad odor and was very messy.
Rancid means having a very bad odor.
Surreptitious means performed in secret.
David was surreptitious when doing his laundry so his mom wouldn't lecture him for having a messy room. He did it very secretively.