Wiktionary
unthreateningly
adv. In an unthreatening way.
Usage examples of "unthreateningly".
Shoulders sagging a little, chin down, hands clasped unthreateningly in front of me.
I am your friend, Guenhwyvar, and I'll not fight against you:' He leaped forward, arms unthreateningly wide, face and chest fully exposed.
It's usually best to approach them slowly and unthreateningly as well.