You can picture osmosis as water quietly seeping through a thin wall, moving on its own toward the side that has less of it, with nobody pushing and nothing to watch. It is slow, steady, and finished before you notice it started.
The word was made in 1826 from Greek ōsmós, a push or impulsion, first inside the pair endosmose (pushing inward) and exosmose (pushing outward). So the name itself already says that something is being moved through.
這個字是 1826 年造出來的，取自希臘文 ōsmós（推）。最早是 endosmose（往內推）和 exosmose（往外推）這一對詞，後來才合成 osmosis。名字裡本來就帶著「有東西被推過去」的意思，正好對上今天那個「東西自己穿過去」的畫面。
Wiktionary entry for osmosis, etymology section (packet source_ref kaikki:3f6f69a190036ae4:285984525:20111)
One branch
滲透：自己慢慢穿過去
兩個用法共用同一個畫面，差別只在滲過去的是水還是知識。
noun · C1
The slow movement of water through a thin wall that lets water pass but holds back the things dissolved in it. The water moves toward the side that has more dissolved in it, until the two sides even out.
滲透（作用）