劣らぬくらい

no less than

→ 劣る
phrase Rare #38,774
no less than A formal or literary expression meaning “to a degree equal to” or “just as much as.” 劣らぬ is an older or formal form of 劣らない. It is often used in the pattern 勝るとも劣らぬくらい, meaning “no less than” or “at least as much as.”
JA: 彼の弟も、彼に劣らぬくらい才能がある。
EN: His younger brother is just as talented as he is.

彼女は英語を話すのが得意兄に勝るとも劣らぬくらい

She's good at speaking English—every bit as good as her older brother.

彼女は賢明だが君も劣らぬくらい賢明

She is wise, but you are just as wise.

彼女は兄に勝るとも劣らぬくらい英語が上手だ

She is every bit as good at English as her older brother.