The antonyms for the word "more uncomplaining" are "complaining", "whining", "grumbling", "discontented", and "displeased". These words describe individuals who express dissatisfaction with their situation, frequently vocalizing their annoyances and discomforts. They are unlike the word "more uncomplaining", which depicts someone who is patient, tolerant, and enduring, even in the face of adverse situations. In contrast, those who exhibit the traits of complaining, whining, grumbling, discontentedness, and displeasure are likely to be perceived as negative or difficult to work with, while persons who are more uncomplaining can be seen as admirable and mature.