IPA: /ɪnˈspɪsəˌteɪtə/
KK: /ɪnˈspɪsəˌteɪtər/
A device used to remove water from liquids, making them thicker or more concentrated.
The chemist used an inspissator to concentrate the solution for the experiment.
Inspissator is formed from "in-" (meaning into) and "spissare" (meaning to thicken). The word refers to the act of making something thicker or denser, particularly in a liquid form.
Think of 'putting something into' ('in-') a state of 'thickness' ('spissare') — that's why inspissator means to thicken something.
No commonly confused words.