free, 自由。-dom, 抽象名词后缀。
It has been said by some physicians, that life is a forced state. The same may be said of freedom. It requires efforts, it presupposes mental and moral qualities of a high order to be generally diffused in the society where it exists. [John C. Calhoun, speech, U.S. House of Representatives, Jan. 31, 1816]Freedom fighter attested by 1903 (originally with reference to Cuba). Freedom-loving (adj.) is from 1841.