hissed / hist are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
hissed: (verb) make a sharp hissing sound, as if to show disapproval. (verb) move with a whooshing sound. (verb) express or utter with a hiss.
hist: NA
hissed: hh·IH·s·t
hist: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)