The term "softened up" refers to the act of making someone or something more receptive to a particular situation or idea. Its antonyms include terms like toughened, hardened, fortified, strengthened, and sharpened. These words signify the act of making someone or something stronger, more resistant, or ready for a challenge. While "softened up" suggests a sense of vulnerability, the antonyms allude to endurance, resilience, and determination. The use of antonyms helps to express the opposite of a particular concept, giving a full understanding of the broad spectrum of ideas associated with a word.