Original definitions include shade, shadow, shady branches, foliage. The word then evolved into meaning something vaguely suggested or hinted at, which led to doubt and suspicion. Finally it evolved into the meaning we know today, a feeling of resentment often at some fancied slight or insult.
I prefer the older meaning. I like the idea of shadow and shady branches, of foliage, of walking beneath ancient trees, in cool dappled light.
Care to take umbrage with me?
It's rather like taking tea don't you think?
Let us not allow ourselves to feel resentment over some fancied slight or insult. Let us instead take a break from our writing and walk among the trees.