Mikazuki no oboroke naranu koishisa ni warete zo izuru kumo no ue yori - Kinyo Wakashu(English Translation & Meaning)

三日月のおぼろけならぬ恋しさに
われてぞ出づる雲の上より

Roma-ji: Mikazuki no oboroke naranu koishisa ni warete zo izuru kumo no ue yori
English Translation: Like the crescent moon,
by no common love compelled,
I break through and come
forth from above the clouds,
from the palace far on high
Meaning: Like the crescent moon breaking through, driven by no ordinary longing, I have forced my way out from above the clouds, from the palace itself.
Commentary: Book Eight Love Poems II 484

As the crescent moon splits the clouds to show itself, so, unable to bear an extraordinary longing, the poet has forced his way out of the palace. Kumo no ue, above the clouds, means the palace, and through the crescent moon the poem expresses the heart of one in court service who has slipped out to meet the beloved.
It shares the words oboroke naranu with the preceding poem, 483, setting a moon that waits for a break in the clouds against a moon that splits the clouds to come forth.

First line, 'mikazuki no', means like the crescent moon, leading into warete in the fourth line.
Second line, 'oboroke naranu', means no ordinary, the same words as the fourth line of the preceding poem, 483.
Third line, 'koishisa ni', means driven by longing.
Fourth line, 'warete zo izuru', means I force my way out, overlaid with the crescent moon emerging from the clouds as if splitting them. The particle zo and the attributive izuru make a break here.
Final line, 'kumo no ue yori', means from above the clouds, overlaid with the sense of the palace, and returns by inversion to izuru in the fourth line.
Source: Kinyo Wakashu
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