The word "umbraging" is not commonly used in the English language, therefore, it does not have many antonyms. However, if we break down the meaning of the word, which refers to one taking offense or feeling insulted, some possible antonyms can be identified. These include words such as content, pleased, satisfied, happy, unruffled, and unconcerned. These antonyms describe a state of positivity and calmness, rather than being offended or feeling insulted. It is always good to have a diverse vocabulary to communicate effectively, but in the case of "umbraging", there are very few alternatives.