Pronunciation: [sˈɪksti͡əθ] (IPA) 
The spelling of the word "sixtieth" can be quite confusing due to its unusual pronunciation. The IPA phonetic transcription for this word is /ˈsɪkstiθ/, meaning it is pronounced as "sikstith." The first syllable is pronounced as "siks" with a short "i" sound, followed by the "t" and "th" sounds combined at the end. With this in mind, it is important to double-check the spelling when using "sixtieth" to avoid any spelling errors.
Sixtieth is an ordinal numeral that represents the numerical position of 60 in a series. It is derived from the cardinal number "sixty" by adding the suffix "-th," which is commonly used to form ordinal numbers. Sixtieth is used to indicate a position or order in a sequence of 60 items, events, or divisions.
As an adjective, sixtieth reflects the specific position of being the last in a set of 60 items. For example, it can refer to the sixtieth page in a book, the sixtieth question on a test, or the sixtieth day of the year. It denotes that this particular item or occurrence is the final one in a series of 60 from a starting point.
Sixtieth is also used as a noun to describe the individual item that represents the number 60 when counted in order. For instance, the sixtieth student in a class refers to the person who comes after the 59th student and just before the 61st. In this context, it emphasizes the position of an item or a person in relation to a sequential arrangement.
Overall, sixtieth is a term that defines the precise rank or item that occupies the number 60 in a sequence, both as an adjective and as a noun.
• The ordinal of sixty.
• One of sixty equal parts.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "sixtieth" is derived from the combination of the word "sixty" and the suffix "-th".
The word "sixty" originated from the Old English word "sixtig", which can be traced back to the West Germanic word "seksitig" and the Proto-Germanic word "seks(t)iġontig", meaning "six tens".
The suffix "-th" is a common suffix in English used to form ordinal numbers, indicating the position or order of a particular item in a series. It comes from the Old English "-þa", which has its roots in the Old Norse "-þe" and the Proto-Germanic "-þō". This suffix has been used in English since Middle English to create ordinal numbers such as "twentieth", "thirtieth", and so on.
