troth

This term carries a heavy weight of antiquity and formality, evoking the atmosphere of medieval chivalry or archaic legal oaths. It is rarely used in modern conversation except when intentionally mimicking a romanticized, old-fashioned style of speech or within specific historical literary contexts.

Because it refers to a conceptual state of loyalty or a singular sacred promise, it functions as an uncountable noun. It does not take a plural form and cannot be counted with numbers; instead, it is treated as a mass noun representing the quality of faithfulness.