邪推

1. Origins, structure, and basic meaning

• Structure: 邪推(じゃすい) is a noun for assuming the worst about someone's intent without adequate grounds.
• Basic usage: The suspected object takes を in 意図を邪推する, while 邪推で疑う presents the assumption as the basis for doubt.

2. Common pitfalls and similar expressions

• Negative assumption
  • This is not a neutral prediction; it carries the sense of interpreting another person's motives in a bad or malicious way.
• Lack of grounds
  • It commonly appears with wording such as 根拠のない邪推 to stress that the assumption is unsupported.