doubt

1. Origins, structure, and basic meaning

• Structure: 疑 has 14 strokes and concerns doubt or suspicion.
• Basic usage: 疑う is read うたがう, and 疑問 is read ぎもん.

2. Common pitfalls and similar expressions

• The object of suspicion and a question
  • 友達を疑う means to suspect a friend. を marks the person being suspected.
  • 耳を疑うほど figuratively means to the point of hardly believing one's ears.
  • The 疑 in 疑問 is read ぎ.
  • 疑問が残った means a question remained.