πεθαίνω

Etymology: From Medieval Greek ἀποθαίνω (apothaino), which comes from Ancient Greek ἀποθνῄσκω (apothnēskō). The prefix ἀπο- (apo-) was dropped over time. Related to 'thanatos' (death) in English words like 'euthanasia' and 'thanatology'. The root *dʰwen- is connected to the concept of disappearing or extinguishing.