Antonyms for the word "ficklenesses", meaning the quality of being unreliable and changing frequently, include stability, constancy, steadfastness, and loyalty. Stability refers to the quality of being consistent and not changing, while constancy refers to the quality of being unchanging in a person's feelings or behavior. Steadfastness refers to the quality of being firm and resolute, especially in the face of challenges, and loyalty refers to a strong sense of allegiance and dedication to a person or cause. By focusing on opposite traits, antonyms like these can help us to better understand the nuances and meanings of words like ficklenesses, and to appreciate the power and complexity of language.