μυρίς does not exist neither as a word nor as a root, and therefore has no connection with “land”, but the word ἁλμυρίς, as Acestor explained the derivation (ἅλς n. (sea)> ἅλμη n.(sea water, brine) > ἁλμυρός adj.(salty, briny) > ἁλμυρίς adj.), is in fact a feminine adjective (coming from ἁλμ-υρά, the feminine of ἁλμ-υρός) which defined the word χώρα as ἁλμυρίς χώρα (=salty land), until sometime in the past the noun χώρα was omitted in the everyday use and the adjective ἁλμυρίς was nominalized and continued its life as a toponym of the place. The modern toponym is the accusative case αλμυρίδα of the ancient nominative case ἁλμυρίς.not able to find theradicalroot for μυρίς, which should mean "land"
Having lived about 3km from Almyrida for the last 23 years, I am grateful for the explanation!μυρίς does not exist neither as a word nor as a root, and therefore has no connection with “land”, but the word ἁλμυρίς, as Acestor explained the derivation (ἅλς n. (sea)> ἅλμη n.(sea water, brine) > ἁλμυρός adj.(salty, briny) > ἁλμυρίς adj.), is in fact a feminine adjective (coming from ἁλμ-υρά, the feminine of ἁλμ-υρός) which defined the word χώρα as ἁλμυρίς χώρα (=salty land), until sometime in the past the noun χώρα was omitted in the everyday use and the adjective ἁλμυρίς was nominalized and continued its life as a toponym of the place. The modern toponym is the accusative case αλμυρίδα of the ancient nominative case ἁλμυρίς.