Wiktionary
unharmful
a. Not harmful.
Usage examples of "unharmful".
The problem, then, was to find a chemical, sufficiently unharmful to life, that would so act upon the body cells as to cause a reduction in bulk, without changing their shape.
It was well known that those places of the Old Ones that held Power that was safe, or at least unharmful, to my race were always touched with that color.
Forgive me and help me to have thoughts that are honoring to You and unharmful to me.