Select the most appropriate one-word substitution for the given group of words.

Travelling under a name other than one’s own

incognito

The most appropriate one-word substitution for "travelling under a name other than one's own" is incognito. It means "in disguise or under an assumed name, especially to avoid attention." The other options are incorrect.

• Impromptu means done without being planned, organized, or rehearsed.
• Incredible means impossible to believe.
• Invisible means unable to be seen.