Why Does Undoubtedly Mean?

Undoubtedly means certainly, definitely, or unquestionably.

Does undoubtedly mean yes?

Undoubtedly means certainly, definitely, or unquestionably.

What does undoubtedly so mean?

Undoubtedly means certainly. If you are undoubtedly beautiful, then everyone agrees you are attractive. No one could think otherwise. There are a lot of things in life that people doubt. However, when you're sure of something or feel strongly about it, this is a handy word.