How do you say something like that?

“There’s a thing for which I don’t know what it is” “There’s a thing where I don’t know what it is” “There’s a thing that I don’t know what is”

or (the one which I hear people say a lot but sounds awkward:) “There’s a thing that/which I don’t know what it is”?

To be honest they all sound awkward to me to varying degrees

  • @[email protected]
    4•1 year ago

    There’s a thing I can’t identify.

    There’s a thing I don’t know about.

    There’s an unfamiliar thing.

    All the formulations you wrote indeed sound either ungrammatical or unwieldy to me.