氣, popularized in English by Qigong.

Literally 'breath' or 'air' and often used in those senses, but also carries connotations of 'energy' or 'vibe'.

Compare the various usages in compound words:

氣球 (qìqiú): lit. air sphere, balloon 空氣 (kōngqì): lit. space qi, atmosphere 天氣 (tiānqì): lit. sky qi, weather 氣功 (qìgōng): lit. breath work 元氣 (yuánqì): lit. essential energy, vitality

From a phenomenological perspective in meditation qi seems closely related to or even equivalent to Piti