Being seemly refers to behaving or dressing appropriately and in a tasteful manner. Antonyms of this term include indecent, inappropriate, immodest, vulgar, and offensive. Indecent behaviours or clothing may not conform to society's standards of morality or ethics. Inappropriate actions or attire may not be suitable for a particular occasion or setting. Immodest actions or dressing may be offensive or too revealing. Vulgar and offensive actions or speech may be disrespectful or distasteful. It is essential to observe appropriate conduct and dress codes according to the social norms and cultural expectations to avoid being criticized or offending others.