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Sentence
Span Details
緊張
tension; nervousness; strain; tensions (between groups); muscle tone; tonusnoun, suru verb
が
subject markergrammar
緩ん
become loose; slacken; relax; become less tense; let one's guard down; become lax; slacken (discipline, supervision); soften; partially melt; decrease (speed); go down slightly (market price)-> 緩むgodan verb
だ。
past tense or completed action-> たgrammar