oath
[C] Countable
pl: oaths
This word carries a heavy weight of obligation and permanence. When used as a formal promise, it suggests a binding contract with a higher power or a legal entity, where breaking the vow leads to severe social or spiritual consequences. It is far more rigid and ceremonial than a simple promise. In its second sense, it refers to a sudden burst of anger or frustration. While a formal oath is measured and slow, a spoken oath is usually explosive and impulsive, serving as a verbal release of tension.
Countable when referring to a specific legal promise or a single swear word.