The antonyms for the phrase "look tenderly" are numerous and varied, depending on the context in which it is being used. In general, though, antonyms for the concept of looking tenderly might include looking coldly, aloofly, indifferently, or dispassionately. Additionally, antonyms might include looking indelicately, harshly, coarsely, brusquely, or rudely. Loosely, antonyms for the phrase might include looking thoughtlessly, unconcernedly, or hastily, with little regard for the object of one's gaze. Ultimately, antonyms for any given phrase depend on the circumstances in which they are being used, and can be contrasted with the original phrase to bring out its essential meaning.