失笑

1. Origins, structure, and basic meaning

• Structure: 失笑 is read as しっしょう and is a noun for laughter that involuntarily slips out at something absurd or laughable; it also combines with する as a verb.
• Basic usage: Laughing at an absurd excuse appears in 言い訳に失笑する, while describing laughter escaping from the audience after a slip appears in 客席から失笑が漏れる.

2. Common pitfalls and similar expressions

• Difference from 爆笑
  • 失笑 is closer to laughter that slips out than loud explosive laughter.