IPA: //ʌnˈθrɛtənɪŋ//
KK: /ʌnˈθrɛtənɪŋ/
Not causing fear or anxiety; gentle and safe.
The puppy had an unthreatening demeanor that made everyone feel comfortable around it.
Unthreatening → It is formed from "un-" (meaning not) and "threatening" (from Old English "þreatian", meaning to threaten). The word "unthreatening" means not causing fear or danger.
Think of 'not' ('un-') causing 'fear' ('threatening') — that's why unthreatening means something that does not pose a threat.