1. My parents are elderly. (its a more gentle way of saying old) 2. I have to take care of my parents because they are elderly. (again, more gentle than old- I wouldnt say "aging" either because that's a given, that we all age. In this situation I feel elderly fits both) I suppose its a matter of tone and setting. This is just how I would say it. :) salud!

In British English, we do not use seniors as a noun - we would say, "the aged" or "the elderly". Also we often refer to older men as having "silver hair" not grey - a mark of respect for them. "Is it that silver haired man in the corner?"

Another suggestion is: My parents are growing grey. I also heard people saying my parents are greying. Just my 2 cents worth.

Thanks so much to both of you!

1. My parents are old/elderly 2. I have to take care of my parents because they’re aging. Although they all mean the same thing, the word “old” is pejorative, it has negative connotations and distasteful to others. So for the first one I’d pick elderly.