Ko
(
コ
)
tsu
(
ツ
)
Ko
(
コ
)
tsu
(
ツ
)
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Vocabulary
N2
Day 33
苦心
New
苦心
苦心
くしん
painstaking effort, taking pains
noun
Sino-Japanese
Lv.5
Again
1
Hard
2
Good
3
Easy
4
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