éʝtsi comes from the prefix eʝ(e)- (< Medieval Greek éðe ‘there’) and the manner adverb étsi ‘so’ (Kretschmer 1905˙ Giannoulellis 1989˙ Papanis & Papanis 2004)
E.g. éʝtsi pu traɣúðʝi fáɲtsi sustí aniraʝíða.
eʝe-étsi pu traɣuðúse fánice sostí aneraʝíða.
‘The way she was singing, she looked like a real fairy’.