from The Century Dictionary.
- In a tender-hearted manner; with tender affection.
Sorry, no etymologies found.
His father, in pity and in humanity, had committed just such a fatal mistake, and trying tender-heartedly to save life had brought about death and disaster.
Jack's guidance, went below to forage for the anæsthetic of immediate crumbs; and Mary, tender-heartedly, remained behind to relieve the tedium of and give comfort to the invalid.