Words similar to regretful

Example sentences for: regretful

How can you use “regretful” in a sentence? Here are some example sentences to help you improve your vocabulary:

One is of tone--Alter is calm, respectful, and regretful.
If the money goes bad, you simply return it with the appropriate regretful noises.
His "Ex-Wife-to-Be" contributes an opposing view: She writes that she's lonelier and more regretful than she ever imagined she could be.
Why, like a regretful mother, unchained ghost, do I hover over old photos when I'm home for Christmas or Thanksgiving, as if I'd all along been living
My guess is a regretful no.