From Wiktionary, the free dictionary
From éí + -sh.
éísh
- Interrogative demonstrative pronoun, used to mark and/or refer to the subject of a question.
- Tsídii éísh łichííʼ? ― Is the bird red?
- Nidagaʼ, tsídii dootłʼizh. ― No, the bird is blue.
Usually refers to something remote from the speaker.