berthyoudaoicibaDictYouDict[berth 词源字典]
berth: [17] Like birth, berth appears to be based on the verb bear, although it is a separate and much later formation. At first it meant ‘safe manoeuvring distance at sea’ (from which we get the metaphorical ‘give a wide berth to’); this seems to have come from the nautical sense of bear ‘steer in a particular direction’ as in bear away (from which we get bear down on, as well as more general applications, such as ‘bear left’). This led, via ‘convenient space for a ship to moor’, to, in the 18th century, the more familiar modern senses ‘sleeping place on a ship’ and ‘job, situation (originally on board ship)’.
=> bear, birth[berth etymology, berth origin, 英语词源]
berth (n.)youdaoicibaDictYouDict
1620s, "convenient sea room" (both for ships and sailors), of uncertain origin, probably from bear (v.) + abstract noun suffix -th (2) as in strength, health, etc. Original sense is preserved in phrase to give (something or someone) wide berth. Meaning "place on a ship to stow chests, room for sailors" is from 1706; extended to non-nautical situations by 1778.
berth (v.)youdaoicibaDictYouDict
1660s, of ships, from berth (n.). Of persons (intransitive), from 1886. Related: Berthed; berthing.