偽名

1. Origins, structure, and basic meaning

• Structure: 偽名 is read as ぎめい and is a noun for an alias or false name used to conceal one's real identity.
• Basic usage: Staying at an inn under an alias appears in 偽名を使って宿に泊まる, while a letter's sender having a false name appears in 差出人が偽名だ.

2. Common pitfalls and similar expressions

• Object used and identity statement
  • Use を使う for the act of using an alias and 偽名だ to state that a presented name is false.
• Difference from 本名
  • It contrasts with one's actual or registered name and denotes a substitute used to hide identity.