An awkward situation is embarrassing and difficult to deal with.

Something that is awkward to use or carry is difficult to use or carry because of its design. A job that is awkward is difficult to do.

An awkward movement or position is uncomfortable or clumsy.

Someone who feels awkward behaves in a shy or embarrassed way.

If you say that someone is awkward, you are critical of them because you find them unreasonable and difficult to live with or deal with.