The word "arsed" is considered a vulgar term that denotes a lack of interest or motivation in doing something. However, there are various synonyms that can be used instead of this term, which are more appropriate for formal or polite language. These synonyms include "bothered," "motivated," "stimulated," "energized," "excited," "enthusiastic," "interested," "avid," "zealous," and "passionate." By using these words instead of "arsed," we can communicate our thoughts and emotions more effectively without sounding vulgar or disrespectful. So, next time instead of using the word "arsed," we can opt for these synonyms to express ourselves more appropriately.