垂れ下がる

1. Origins, structure, and basic meaning

• Structure: 垂れ下がる is read as たれさがる and is an intransitive verb meaning to hang down or droop from above.
• Basic usage: A drooping object appears in 旗が垂れ下がる, while its origin appears in 屋根から垂れ下がる.

2. Common pitfalls and similar expressions

• Subject marker が
  • The object that hangs down is the subject of this intransitive verb and therefore takes が.
• Difference from 垂らす
  • 垂らす is transitive and means making something hang, while 垂れ下がる describes the object hanging down.