Incorrect spelling, explanation: 23th is the wrong way of writing the ordinal number twenty-third because it doesn’t end with the sound -th. When the ordinal number ends with third, the only correct suffix is -rd as in 23rd.

Correct spelling, explanation: this ordinal number, 23rd, is written with the suffix -rd, because, when pronounced, it is heard (twenty-third). Another suffix is -th, which is incorrect to use here because there is no -th at the end of the word when we pronounce it. This is why writing 23th is wrong.

Definition of 23rd:numeral, the ordinal number between 22nd and 24thThis is his 23rd purchase in this online bookshop this year. He must be a real bookworm.

Incorrect spelling

Incorrect spelling