Mono omou to tsukihi no yuku mo shirazaritsu kari koso nakite aki to tsugetsure - Gosen Wakashu(English Translation & Meaning)

物思ふと月日のゆくも知らざりつ
雁こそ鳴きて秋と告げつれ

Roma-ji: Mono omou to tsukihi no yuku mo shirazaritsu kari koso nakite aki to tsugetsure
English Translation: Lost in my brooding,
I never knew how the months
and days slipped away—
it was the wild geese, crying,
that told me autumn had come
Meaning: Lost in brooding, I never noticed the months and days slipping past; it was the wild geese, crying, that told me autumn had come.
Commentary: Book Seven Autumn Poems III 358

Headnote: "Topic unknown."
The poet says that, so lost in brooding as not to notice the months and days going by, it took the cries of the wild geese to announce that autumn had come. It conveys a melancholy so deep that it forgets even the turning of the seasons.
Where the poems before it waited and listened for the geese, in this one the poet is told of autumn unexpectedly by their cries.
The poet is listed as "anonymous," and the composer's name has not come down to us.
The text gives the last line as "aki to tsugetsure," which does not match "aki to tsugekere" in the kana reading line. The wording of the text is followed here.

The first line, "Mono omou to," means "as I brooded."
The second line, "tsukihi no yuku mo," means "even the passing of the months and days."
In the third line, "tsu" is the completive auxiliary: "I did not know." The poem pauses here.
In the fourth line, "koso" is an emphatic particle: "it was the geese, crying."
In the last line, "tsure" is the realis form of the completive auxiliary "tsu," forming a kakarimusubi pattern with "koso" in the fourth line: "they told me it was autumn."
Author: Unknown Poet
Source: Gosen Wakashu
Prev Poem: Akikaze ni kumo tobiwakete kuru kari no chiyo ni kawaranu koe kikoyu nari
Next Poem: Karigane no nakitsuru nae ni karakoromo Tatsuta no yama wa momiji shinikeri