- healthful (adj.)
[healthful 词源字典]
- late 14c., "wholesome, curative, saving, serving to promote health," from health + -ful. Meaning "free from disease, healthy" is attested from 1540s but is rare. Related: Healthfully; healthfulness.[healthful etymology, healthful origin, 英语词源]
- insanity (n.)
- 1580s, "state of being insane," from Latin insanitatem (nominative insanitas) "unhealthfulness," noun of quality from insanus (see insane). Meaning "extreme folly" is from 1844.