asylumyoudaoicibaDictYouDict[asylum 词源字典]
asylum: [15] Greek sulon meant ‘right of seizure’. With the addition of the negative prefix a- ‘not’ this was turned into the adjective ásūlos ‘inviolable’, which in turn was nominalized as āsūlon ‘refuge’. When it first entered English, via Latin asylum, it was used specifically for ‘place of sanctuary for hunted criminals and others’ (a meaning reflected in modern English ‘political asylum’), and it was not until the mid 18th century that it came to be applied to mental hospitals.
[asylum etymology, asylum origin, 英语词源]
asylum (n.)youdaoicibaDictYouDict
early 15c., earlier asile (late 14c.), from Latin asylum "sanctuary," from Greek asylon "refuge," noun use of neuter of asylos "inviolable, safe from violence," especially of persons seeking protection, from a- "without" + syle "right of seizure." So literally "an inviolable place." General sense of "safe or secure place" is from 1640s; meaning "benevolent institution to shelter some class of persons" is from 1776.