Meaning

noun everything that is included in a collection and that is held or included in something

verb satisfy in a limited way

adjective satisfied or showing satisfaction with things as they are

originFrom Middle English content (plural contentes, contence), from Latin contentus, past participle of continēre (“to hold in, contain”), as Etymology 1, above. English apparently developed a substantive form of the adjective, which is not mirrored in Romance languages.

Etymology from Wiktionary, CC BY-SA 3.0