alias
Definition
A name or identity used by someone for secret or undercover purposes, or a name that a person uses for a particular purpose
日本語 秘密や偽装のために使う名前
Example
"The detective discovered the spy's alias."
A name or identity used by someone for secret or undercover purposes, or a name that a person uses for a particular purpose
日本語 秘密や偽装のために使う名前
"The detective discovered the spy's alias."