Jäähtynyt

Jäähtynyt is a Finnish adjective and past participle derived from the verb jäähtyä, meaning to cool down or become cold. It describes something that has lowered its temperature to a level below its initial state or relative to its surroundings, and has reached a relatively stable, cooler condition. The form is used both in everyday speech and in technical language to indicate completed cooling, as opposed to ongoing cooling.

In usage, jäähtynyt can modify nouns directly: jäähtynyt kahvi (coffee that has cooled), jäähtynyt vesi (cooled water), jäähtynyt metallikappale (cooled metal piece). It can also occur in predicative position: Kahvi on jäähtynyt. It is common in culinary contexts to indicate readiness for consumption or for further handling, and in science and industry to describe materials after a cooling process. Note that for liquids or foods, jäähtynyt indicates a state after cooling rather than ongoing temperature change.

Etymology and grammar: Jäähtynyt is formed from jäähtyä + -nyt, a standard Finnish past participle suffix. The related noun is jäähtyminen (the process of cooling). Related verbs include jäähtyä (to cool down). Opposed forms include jäätynyt (frozen), which denotes solidification rather than mere cooling.

See also: jäähtyminen, jäähdytys, jäätyminen.