IPA: /ˈhɪsər/
KK: /ˈhɪsər/
A person or thing that makes a hissing sound.
The snake is a hisser, warning us to stay away.
The word 'hisser' is derived from 'hiss' (of imitative origin, representing the sound made) and the suffix '-er' (meaning a person who performs an action). Therefore, 'hisser' refers to a person who makes a hissing sound.
Think of someone who makes a 'hissing' sound — that's what a 'hisser' does, and the '-er' just means a person who performs that action.