顎髭

1. Origins, structure, and basic meaning

• Structure: 顎髭, read あごひげ, denotes facial hair growing on and around the chin.
• Basic usage: It names facial hair on the chin that is trimmed in a mirror or grown for an acting role.

2. Common pitfalls and similar expressions

• Hair specifically on the chin
  • It specifically identifies hair growing around the chin rather than facial hair in general.