Whinier is an adjective used to describe someone who complains excessively or in a high-pitched, irritating tone. Antonyms for this word would therefore describe someone who is content, happy, or positive. Some possible antonyms for "whinier" could include words like satisfied, grateful, cheerful, contented, pleased, delighted, or gratified. These words all suggest a sense of peace and satisfaction, or a lack of the negative emotions associated with whining. Using antonyms to describe someone in a positive way can help to shift their perspective and emphasize the good things in their life, rather than focusing on the negative.