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almost; roughly; approximately; about; around
「粗」 has other readings with different meanings.
作業は粗終わりました。
The work is almost finished.
粗予想どおりの結果が出た。
The results came out roughly as expected.
調査は粗完了しているのであとは報告書だけだ。
The survey is nearly complete, so all that is left is the report.