去る

1. Origins, structure, and basic meaning

• Structure: 去る, read さる, functions both as a verb meaning to leave and as an attributive expression meaning last or past before a time noun.
• Basic usage: A departed place appears in 駅を去る, while a past season appears in 去る春.

2. Common pitfalls and similar expressions

• Departure and time modifier
  • Context separates the train's physical departure from the attributive use that identifies the spring already past.
• Place marked by を
  • In 駅を去る, を marks the place left behind; it does not make the station an object that is acted upon or changed.