Hyposensitivity is the polar opposite to hypersensitivity. The only difference between these two words is that the o replaces the er, hence, this tiny aspect often leads to misuse of the words, resulting in utter confusion for all. Even my very distinguished and experienced clinical psychologist slipped up and was (oh so helpfully) gently reminded by me.

An example of hyposensitivity would be not being able to feel pain when we burn ourselves, or when we walk into a door frame and wonder what the bruises are all about later. When we’ve spent a silly amount on a fancy perfume but have no idea how much to spray because we can’t smell a thing. When we’re sitting with a neurodivergent pal, who is being tortured by the sound of that buzzing coming from the back of the television and we can’t even hear the dog barking.

So, your level of sensitivity is considered lacking if it is less than would typically be expected. Whether that be less sense of smell, hearing (often specific pitches), taste, touch and/or pain, light, cold…you get the idea.

Intricately intertwined with this is yet another fancy word, see interoception if this interests you.