own
Old Englishown, possess, acknowledge
About This Root
Own is one of the oldest, most homegrown words in English — pure Germanic, never touched by Latin or French. It comes from Old English āgen, the past participle of āgan 'to possess.' Originally āgen meant 'possessed, had' — so 'my own house' literally meant 'my possessed house.' From that adjective, English later built a verb: to own something is to have it as your own.
The same Old English verb āgan is also the ancestor of owe and ought — words about what you possess having turned into what you are obliged to give. (If you 'have' a debt, you owe it.) So the deep family connects possession (own), obligation (owe), and duty (ought) — all from one idea of 'having.'
The own family proper is small but solid: own (verb and intensifier), owner (the one who possesses), ownership (the state of possessing), and disown (dis- 'reverse' + own = to refuse to own, to renounce a person or thing). Notice 'own' has a second life as an intensifier — 'my own room,' 'do it on your own' — where it doesn't add a new word but stresses that something belongs to you alone.
The modern slang sense, to 'own' a moment or to 'own up' to a mistake, grows naturally from possession: owning your behavior means taking full possession of it, refusing to push it onto anyone else.
An owner is simply someone who owns — the word wears its meaning on its face. To disown is the reverse: dis- ('un-do') + own = to push someone out of your possession.
Core Words Deep Dive
The few words from this family worth telling in full — one by one.
Three jobs in one word. (1) Verb: to possess legally — 'they own the building.' (2) Intensifier after a possessive: 'my own car,' 'her own decision' — stressing exclusivity. (3) The phrase 'on one's own' means alone/independently. All three flow from the Old English sense 'possessed by oneself.'
own + -ship ('state, status') = the state of owning. Beyond the legal sense (home ownership, ownership structure), it has a strong modern figurative use: 'take ownership of a problem' means to accept full responsibility, as if the problem were your possession to fix.
dis- ('reverse, undo') + own = to declare that something is no longer yours. Used most often about people — disowning a child or a relative means cutting all ties and refusing to claim them. It is the social opposite of owning someone as family.