Select the most appropriate meaning of the given idiom.

Feel at sea

Feel lost or confused

The most appropriate meaning of the idiom "feel at sea" is feel lost or confused.

It means to feel disoriented or overwhelmed, like you are in a situation that you do not understand or cannot control. The idiom comes from the literal meaning of being at sea, which can be a disorienting experience for people who are not used to it.

The other options are not correct.

• Feel seasick: This means to feel nauseated or dizzy from being on a boat or ship.
• Feel angry: This is not the same as feeling at sea.
• Feel comfortable while travelling by water: This is not the same as feeling at sea.