Furusato no itai no shimizu mikusa ite tsuki sae sumazu narinikeru kana - Senzai Wakashu(English Translation & Meaning)

ふるさとの板井の清水みくさゐて
月さへすまずなりにけるかな

Roma-ji: Furusato no itai no shimizu mikusa ite tsuki sae sumazu narinikeru kana
English Translation: At my old home place
the clear spring of the board-lined well
is choked with water weeds,
and now not even the moon
dwells there, shining clear
Meaning: At my old home the clear water of the board-lined well is overgrown with water weeds, and now not even the moon shines clear there or dwells in it.
Commentary: Book Sixteen Miscellaneous Poems I 1011

Headnote: "Composed on "The moon at my old home""
This poem was composed on the theme "the moon at one's old home." The clear water of the board-lined well at my old home is choked with weeds, and not even the moon shines clear there now, he says. In the old village no longer lived in, the well goes untended and water weeds flourish, so that even the moonlight is no longer reflected clear; with "sumazu" meaning both not clear and not dwelling, he expresses the loneliness of a ruined home.
The author, "Priest Shun'e," was a son of Minamoto no Toshiyori. He became a monk of Tōdaiji and gathered poets at his lodging in Shirakawa in the capital, which he named the Karin'en, the Garden of Poetic Forest. He was the teacher of Kamo no Chōmei, and a poem of his is included in the Ogura Hyakunin Isshu.
Where 981 of this book sings that over a ruined old capital "the moon alone dwells clear," this poem sings that in a ruined home "not even the moon dwells clear," a reversed conceit around the moon over a desolate place.

First line, "furusato no": "of the old, ruined village."
Second line, "itai no shimizu": the clear water of a well lined with boards.
Third line, "mikusa ite": "mikusa" means water weeds and "iru" to grow, "water weeds having grown."
Fourth line, "tsuki sae sumazu": "sumazu" is a pivot word meaning both that the moon does not shine clear and that no one dwells there. It pairs with "tsuki hitori sumu" in the fifth line of 981 of this book.
Fifth line, "narinikeru kana": "ni" is the continuative of the perfective "nu," "keru" the attributive of the exclamatory "keri," and "kana" exclamatory, "so it has become."
Author: Shun'e
Source: Senzai Wakashu
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