In Germanic law, an oath-breaker was the most reviled figure in society — the justice system rested on sworn words.
A solemn promise, often invoking a divine witness, regarding one's future actions or behaviour.
From Old English 'āþ' (oath, a solemn pledge), from Proto-Germanic *aiþaz (oath), of uncertain PIE origin — possibly from *h₁oi-to- (a going, a way, a course of action), treating an oath as a path one commits to following. The oath was the cornerstone of Germanic legal and social life: an 'āþbreca' (oath-breaker) was among the most stigmatised figures in Anglo-Saxon society because the entire legal system rested on sworn testimony rather than documentary evidence. Oaths were sworn on sacred objects — weapons, rings (the arm-ring 'baugr' of Old Norse law), or holy books — because the sanctity of the object was
In Anglo-Saxon law, oaths were so foundational that a person's legal credibility was measured by their 'oath-worthiness.' A nobleman's oath counted for more than a commoner's, and cases could be decided entirely by competitive oath-swearing — the party who could gather more oath-helpers (people willing to swear to their truthfulness) won. Breaking an oath was not just immoral but legally destructive, disqualifying a person from ever giving testimony again.