IPA: /dɪˈkɒkt/
KK: /dɪˈkɑkt/
To extract flavors or substances from something by boiling it in water.
She decided to decoct the herbs to make a soothing tea.
Past: decocted
Past Participle: decocted
Decoct is formed from "de-" (meaning down or away) and "coctus" (from "coquere", meaning to cook). The word refers to the process of cooking down a substance, typically to extract flavors or medicinal properties.
Think of 'cooking down' ('coquere') something to extract its essence, which is what decoct means.