Each entry gives the term in traditional and simplified form, its pinyin, the senses it carries in the classical corpus, the passages where it does real work, and how published translations have rendered it.
qì
Qi is what the texts call the activity of a thing rather than the thing itself — the breath, warmth and movement by which a system does its work. This site leaves it untranslated, because every English substitute (energy, force, vital power) implies a physics the texts never assume.
qì wèi
Chapter 22 says that food and drug alike should be taken with their qi and flavour in accord, and thereby supplement the essence and boost the qi. It is the sentence that keeps the chapter's dietetics from being a flavour table. A taste without its qi or a qi without its taste is half a remedy, and the rest of the chapter has already shown why: the same bitter that firms the kidney drains the spleen, so flavour alone never decides anything. What decides is what is taken, with what, and by whom.
qì jué
The name chapter 37 gives to its own subject: illness that moves from one viscus into another because qi has run contrary to its course. The chapter lists fifteen such transmissions and closes by naming the single cause behind all fifteen.