physis

[fahy-sis] /ˈfaɪ sɪs/
noun, plural physes
[fahy-seez] /ˈfaɪ siz/ (Show IPA)
1.
the principle of growth or change in nature.
2.
nature as the source of growth or change.
3.
something that grows, becomes, or develops.
Origin
< Greek phýsis origin, natural form of a thing; akin to phŷlon race (see phylon)