weakness 弱いこと、弱々しさ、虚弱、薄弱、優柔不断、軟弱、気の弱さ、(証拠)不十分、根拠薄弱、欠点 https://talkenglish.xsrv.jp/wp-content/uploads/2019/03/weakness.mp3 both strength and weakness 強さと弱さ
