Un-objectionable means something that is acceptable or not causing any harm or offense. The antonyms for un-objectionable are objectionable, offensive, displeasing, unpleasant, and disagreeable. Something that is objectionable may not be suitable or appropriate for a particular situation or audience. It may cause discomfort, offense, or disgust. Offensive means something that is disgusting or repulsive to the senses or which violates social, moral, or ethical values. Displeasing means something that is not satisfying or fails to meet expectations. Unpleasant describes something that is unpleasant, harsh or causing discomfort. Disagreeable means something that is unpleasant or not easy to deal with.