~こそ (emphatic focus)
grammar6 sentences
The emphatic particle ~こそ singles out its preceding element for focus — 'precisely X / X above all / X this time for sure / it is X (and not something else).' Stronger than は for emphasis. Common in 今度こそ ('this time for sure'), こちらこそ ('the pleasure is mine'), 君こそ ('you in particular'), 文法解釈こそ王道 ('grammar interpretation is THE royal road').
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