不精之至 bù jīng zhī zhì

bù jīng zhī zhì phrase a supreme lack of proficiency
Domain: Literary Chinese 文言文
Notes: Quote: from the Warring States period text 孫子兵法 “Art of War” by Sunzi, section 9 (Amies 2021 tr.; see also tr. by Giles 1910, p. 95)