Each concept here is mapped to its prerequisites — the ideas you'd need first to understand it — all the way down to four foundations: Space, Time, Energy, Pattern. Click any prerequisite to drill down, or scroll for the chain graph.
A container that holds water for bathing is a space that contains matter and radiation, governed by physical laws and properties, and is used to manipulate water, which requires element and matter.
External reference — all senses of the word “Bathtub” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.
Trace. Question. Emerge.