According to a Bible dictionary, the word pneuma "is usually the wind [...] or breath; and in a narrow sense, the mind, like the wind, is invisible, immaterial and powerful.
Go ya ka Vine's Expository Dictionary of New Testament Words, lefoko pneuʹma "totatota le kaya phefo . . . gape le kaya mohemo; mme segolobogolo le kaya moya, o jaaka phefo o sa bonaleng, o se na sebopego e bile o le maatla."