こそ exactly, truly, for sure, precisely (#170)
1. 今度こそ勝てると思うI think I can win this time for sure. 2. 君こそ本当の友達だYou are truly a real friend. 3. 今日こそ早く帰るつもりだI plan to go home early today for sure. 4. これこそ探していたものだThis is exactly what I was looking for. 5. 努力こそ成功の秘訣だHard work is precisely the secret to success.