steely, have a mind like a steel trap, Steel-Trapped Minds

Under Boris Johnson, Britain’s China posture has hardened dramatically, and now looks closer to America’s stance



ECONOMIST.COM
Britain's relationship with China is more steely than golden
No longer glistening



Trump’s Steel-Trapped Minds 

A new Trump steel tariff would crush his ‘forgotten’ workers.



mind like a steel trap, have a
Be very quick to understand something, as in Aunt Ida may be old, but she still has a mind like a steel trap. Thissimile likens the snapping shut of an animal trap to a quick mental grasp.

steelyの意味 - goo辞書 英和和英 dictionary.goo.ne.jp › 英和・和英辞書 steelyとは。意味や和訳。[形]（-i・er；-i・est）1 鋼鉄（製）の1a （硬さが）鋼鉄のような1b 〈物・色が〉（鋼鉄のように）灰色の2 〈決心などが〉断固とした；〈目つき・表情などが〉断固とした；冷酷なsteelyの派生語steeliness名 - 80万 .