浮気

1. Origins, structure, and basic meaning

• Structure: 浮気, read うわき, denotes infidelity or an affair outside a romantic relationship.
• Basic usage: It is used both for suspected infidelity and for an actual affair that damages trust between partners.

2. Common pitfalls and similar expressions

• Infidelity within a relationship
  • This concerns suspected or actual infidelity in a romantic relationship, including an affair that destroys trust. It should not be weakened to a mere temporary change of interest.