Principal

常

Always, Common, Constant, Frequent, Frequently, General, Long, Often, Ordinary, Principal, Proverb, Regular, Rule, Use, Usual, Usually

正

Appropriate, Correct, Exactly, First, Honest, In the, Just, Justified, Main, Person, Principal, Punctual, Pure, Straight, Straightforward, Unbiased, Upright, Virtuous