1. (任务、工作)招致不满的，引起反感的
If you describe a task or job as invidious, you mean that it is unpleasant because it is likely to make you unpopular.

2. (比较、选择)不公平的，难以决定的
An invidious comparison or choice between two things is an unfair one because the two things are very different or are equally good or bad.

1. containing or implying a slight or showing prejudice

e.g. discriminatory attitudes and practices
invidious comparisons

Synonym: discriminatory