The word "thirtieths" is spelled with "-th" at the end, indicating a cardinal number that indicates the position of something in a series. In IPA phonetic transcription, the word is spelled /ˈθəːti.əθs/, with stress on the second syllable. The "-th" sound is pronounced as a voiced dental fricative /ð/ and is followed by a schwa /ə/ sound, which is repeated in the second syllable. The "-s" sound is pronounced as an unvoiced alveolar fricative /s/.
Thirtieths is the plural form of the noun "thirtieth" which refers to the numerical position of the number 30 in a sequence. It denotes the quantity or fraction that corresponds to or represents the cardinal number 30 when divided into equal parts. Thirtieths can be used in different contexts such as mathematics, fractions, or sequential ordering.
In mathematics, thirtieths typically relates to fractions where the numerator is 1 and the denominator is 30. For example, when dividing a whole into 30 equal parts, each of those parts is regarded as a thirtieth. Thirtieths can also be expressed in decimal form as 0.0333, as 1 divided by 30 yields the recurring decimal 0.0333.
In terms of sequential ordering, thirtieths indicates the item or place that comes after the twenty-ninth and before the thirty-first in a series or list. For instance, in a sequence of 30 items, the thirtieth item or element refers to the one positioned at number 30.
Overall, thirtieths is a noun used to denote both the numerical amount represented by the number 30 when divided into equal parts and the position of an item or element in a series that comes after the twenty-ninth.
The word "thirtieths" is derived from the combination of two different words: "thirty" and "th".
The term "thirty" comes from the Old English word "þritig", which is related to the Old High German word "drisig" and the Old Norse word "tretti". All these words can be traced back to the Proto-Germanic word "thrijizig", meaning "three tens".
The use of the suffix "-th" to indicate ordinal numbers, like "thirtieth", comes from Middle English and was influenced by Old English "-teoða" or "-teoðe", meaning "tenth".
Therefore, when we combine "thirty" with the ordinal suffix "-th", we form "thirtieth", which refers to the number occupying the position of 30 in a sequence.