classic waka stream

恋しけく日長きものを逢ふべくある
宵だに君が来まさずあるらむ
Roma-ji

Koishikeku kenagaki mono o aubeku aru yoi dani kimi ga kimasazu aruramu

English Translation
The time of longing
is so long, so many days,
yet on this evening
when at last we're meant to meet,
why is it you do not come?
Meaning
The days of longing are so long—so why is it that even on this evening when we are meant to meet, you do not come?
Commentary
Book Ten Autumn Miscellaneous Poems 2039

Headnote continued from the preceding poem: "Tanabata"
This poem, in the Weaver's voice, laments why the Herdsman does not come even on this evening when they may meet, though the days of longing are so long. On the very night awaited for a year, anxiety and impatience at the other's delay show through. Like the preceding two poems it uses the phrase "kenagaki mono o," continuing the lament premised on long days of separation.

The first line, "koishikeku," is the nominalized form of "koishi": the longing.
The second line, "kenagaki mono o," though the days are long, is the same as in the preceding poem.
The third line, "when we may meet," is hypermetric.
In the fourth line, "yoi dani kimi ga," "dani" means even: even on the evening we should meet.
In the last line, "kimasazu aruramu," "masu" is honorific and "ramu" conjectures the cause, closing with worry over why he does not come.
Source
Manyoshu
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