Yeth

The word “yeth” is used in the Southern part of Poland to substitute any adjective. Yeth is used to give the person/people you are talking to a less specified remark, and to give them more freedom to assume what you mean by yeth. This word was used by Polish spies in 1881 in order to explain classified topics, and answering classified questions.

Hello, I am feeling much yeth today.
Those buildings over there are kinda yeth.
Stop acting such yeth!