Zi Collection, Page Position: Lower
Radical: Power (lì)
The character 勁; Kangxi Strokes: 9; Page 147, entry 07
From Tang Rhyme (Tángyùn): pronounced jūzhèng qiè. From Jiyun (Jíyùn) and Yunhui (Yùnhuì): pronounced jiānzhèng qiè. From Zhengyun (Zhèngyùn): pronounced jūqìng qiè, like jǐng in the departing tone.
Shuowen (Shuōwén Jiězì): Strong, powerful. Formed from Radical: Power (lì), with jīng as the phonetic component.
Guangyun (Guǎngyùn): Robust, vigorous.
Zengyun (Zēngyùn): Firm, strong; vigorous, robust.
Zuo Commentary (Zuǒzhuàn), Duke Xuan, Year 12: "Striking the balance, reserving strength for the end."
Also, in Zhengyun (Zhèngyùn): Sometimes written as shàn. Book of Rites (Lǐjì), Qūlǐ chapter: "Swiftly mend their anger."