Unnerving is defined as something that causes a feeling of fear, anxiety, or discomfort. The antonyms for unnerving would be words that convey a sense of comfort, reassurance, or calmness. Some of the antonyms for unnerving are soothing, calming, settling, reassuring, comforting, tranquilizing, and easing. These words imply a sense of relaxation and peace, which is the opposite of the unsettling or disturbing quality of unnerving. Using these antonyms can convey a feeling of safety and security, especially in situations where there is uncertainty or unrest. Employing these antonyms can also be useful in making a space, a person or a situation more appealing or approachable.