寝込む

1. Origins, structure, and basic meaning

• Structure: 寝込む, read ねこむ, compounds lying or sleeping 寝 with going deeply into a state 込む.
• Basic usage: 風邪で寝込む means being confined to bed by illness, while 昼まで寝込む means sleeping deeply for a long time.

2. Common pitfalls and similar expressions

• Distinguishing meanings
  • An illness cause or a duration expression distinguishes the senses, both of which last longer than briefly lying down 横になる.