腰こしの強つよい

i-adjective

firm; persevering; resilient

Literally 'strong-waisted', used figuratively for a person's character: stubbornly persistent, unyielding, or resilient under pressure. Often implies a tough, unbreakable spirit.

See also: 腰が強い

• 彼かれは腰こしの強つよい交こう渉しょう相あい手てだ。

  He is a tough, unyielding negotiator.

• あの選せん手しゅは腰こしの強つよいプレーで知しられている。

  That player is known for his resilient, hard-to-break style of play.