The term 'NEGOTIATOR's Skill' can be summarized as the ability to use TACT in negotiations. TACT is defined as the ability to deal with people in a sensitive and diplomatic way, avoiding giving offense or causing upset. It is an important skill for negotiators, as it allows them to effectively communicate their needs and desires while still respecting the other party's position. Negotiators must also be able to read the other party's body language and tone of voice in order to understand their true intentions and feelings. By using TACT, negotiators can create a positive atmosphere and reach a mutually beneficial agreement.