Hatsusegawa nagaruru mio no se o hayami ide kosu nami no oto no kiyokeku

泊瀬川流るる水脈の瀬を早み
ゐで越す波の音の清けく

Roma-ji: Hatsusegawa nagaruru mio no se o hayami ide kosu nami no oto no kiyokeku
English Translation: The Hatsuse River—
the channel of its current
so swift in the rapids
that the waves spill over the weir
with a sound so pure and clear
Meaning: So swift are the rapids in the Hatsuse River's flowing channel that the waves spilling over the weir make a sound of perfect clearness.
Commentary: Book Seven Miscellaneous Poems 1108

Headnote continued from the preceding poem: "On Rivers"
This poem praises the pure sound of the waves as the Hatsuse River's swift current spills over a weir. Where the preceding poem caught the white foaming shallows by sight, this one catches the sound of the waves by ear, so that the pair depicts both the look and the sound of the river's rapids.
It is one of the poems in the river group praising pure river sounds. The poet is unknown.

The first line repeats the first line of the preceding poem, carrying the Hatsuse River from one poem to the next.
In the second line, "the channel of its current," "mio" means the line of the current in the river.
The third line, "so swift in the rapids," uses the "... o ... mi" construction to give the cause: because the shallows are swift.
In the fourth line, "ide" means a weir built to dam the water and raise its level: waves spilling over the weir.
The final line ends with "kiyokeku," the nominalized form of "kiyokeshi," exclaiming how pure the sound is.
Source: Manyoshu
Prev Poem: Hatsusegawa shirayūbana ni ochitagitsu se o sayakemi to mi ni koshi ware o
Next Poem: Sahinokuma hinokumagawa no se o hayami kimi ga te toraba koto yosemu kamo