purify

purify - verb

remove impurities from, increase the concentration of, and separate through the process of distillation
make pure or free from sin or guilt
become clean or pure or free of guilt and sin

purify - thesaurus

Scrabble score = 14

"I ran the trial with a small group of students over three weeks before the summer holidays," she says. "I quickly saw the benefits, and signed up."

King's Leadership Academy, Warrington