hospice (n.)youdaoicibaDictYouDict[hospice 词源字典]
1818, "rest house for travelers," from French hospice (13c.), from Latin hospitium "guest house, hospitality," from hospes (genitive hospitis) "guest, host" (see host (n.1)). Sense of "home for the aged and terminally ill " is from 1893; hospice movement first attested 1979.[hospice etymology, hospice origin, 英语词源]
thanatology (n.)youdaoicibaDictYouDict
"scientific study of death," 1837, from thanato- "death" + -logy. In 1970s, some undertakers made a bid to be called thanatologists; but from 1974 that word has been used principally in reference to specialists in the needs of the terminally ill.
active euthanasiayoudaoicibaDictYouDict
"The ending of a terminally ill person's life by direct intervention, such as administering a lethal dose of painkilling drugs", 1950s; earliest use found in University of Pennsylvania Law Review.