What do we call the “rd” in “3ʳᵈ” and the “th” in “9ᵗʰ”?
https://english.stackexchange.com/questions/192804/what-do-we-call-the-rd-in-3%CA%B3%E1%B5%88-and-the-th-in-9%E1%B5%97%CA%B0
WEBAug 23, 2014 · The addition of -th/ -eth relates to numbers 4 to 20 (and similarly,) and is a suffix to the cardinal number. However, as in the second and third examples, the rd & st simply come from the right-end of the word for the ordinal number: 3rd: thi rd.
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