The customary meaning is that which a word has in natural speaking. Natural speaking means speaking as it always takes place initially and for the most part, and where another mode of speaking with the world is at hand, namely, the scientific mode. The customariness of meaning and of expressing means, further, that it operates in the averageness of understanding. It is suitable for being circulated as self-evident; it is understood “without qualification.” “People” understand an expression that has the character of the customary without qualification; it exists in the common store of language into which every person is brought up from the start. [Heidegger  , GA18:23-24]