The word "tenths" is built upon the ancient and stable concept of the number ten, represented by the Germanic root "ten." The addition of the ordinal suffix "-th," which has origins in Old English, transforms the cardinal number into its sequential or fractional form, meaning "one of ten equal parts." Finally, the plural suffix "-s" is appended, a standard feature of English grammar inherited from its Germanic lineage, to denote multiple such parts or positions. Thus, the compound morphemes logically progress from a base number to a fractional ordinal, and finally to its plural form, encapsulating a precise mathematical relationship.

Structure: ten (number) + th (ordinal suffix) + s (plural suffix) - ten: From Old English 'tēn', 'tīen', of Germanic origin; related to Dutch 'tien' and German 'zehn'. Functions as the cardinal number base. - th: From Old English '-þa', '-þe', '-oþ', an ordinal-forming suffix. Its functional role is to convert a cardinal number into an ordinal number (e.g., ten → tenth). - s: From Old English '-as', the most common suffix for forming regular plurals in English. Its role is to indicate more than one instance.