Giving word, also known as a promise, is a commitment to carry out a particular action or fulfill an obligation. However, there are several antonyms for this term. One of the most fitting antonyms is "break a promise," signifying the act of not keeping one's word. Other antonyms include "dishonesty," "unreliability," and "betrayal." These antonyms highlight the negative impact of not following through on commitments and the importance of trust and reliability. It is essential to keep one's word to build strong relationships and maintain credibility in personal and professional settings.