The antonyms of the phrase 'extend hand' can be classified into various categories. In one category, it includes words such as reject, refuse, withdraw, retract, and retreat. These words refer to the act of rejecting an offer or retreating from a situation or person. Another category includes words like withhold, hold back, detain, and restrict. These words imply the act of keeping something or someone back or preventing them from moving forward. On the contrary to extend hand, words like ignore, neglect, and avoid are used to indicate a lack of interest or willingness to engage with someone or something. Therefore, while the phrase 'extend hand' signifies a friendly, open gesture, its antonyms imply the opposite.