The crossword solution for the term CAREFUL USE OF WORDS is TACT, which is a four-letter word. TACT is defined as the ability to say or do the right thing at the right time in a sensitive or diplomatic way. It is an important skill to have when communicating with others, as it can help to avoid misunderstandings and hurt feelings. By using TACT, one can express their thoughts and opinions without offending or upsetting anyone.