Here the abstract noun "likeness" means that what Ezekiel saw looked like a man. Both "likeness" and "appearance" can be translated with a verbal phrase. Alternate translation: "there was someone who appeared to be a man" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])
The abstract noun "appearance" can be translated as a verb. Alternate translation: "what appeared to be his hips ... what appeared to be something shining" (See: [[rc://en/ta/man/translate/figs-abstractnouns]])