[weigh one's words] {v. phr.}
To choose your words carefully; be careful to use the right words.
* /When a teacher explains about religion, he must weigh his words because his pupils may be of several different faiths./* /When old Mr. Jones talked to the students about becoming teachers, he spoke slowly, weighing his words./* /In a debate, a political candidate has little time to weigh his words, and may say something foolish./