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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
thirty-oneth
Grammar usage guide and real-world examplesUSAGE SUMMARY
'thirty-oneth' is not a correct or usable word in written English.
You might mean 'thirty-first' instead, which is the correct form of the word. For example: On January 31st, I attended the thirty-first annual gala.
⚠ May contain grammatical issues
Alternative expressions(19)
thirty-first
last day of the month
the end of the month
last day
thirteenth day of the month
on the third of the month
first day of the month
month's end
beginning of the month
third day in the month
twentieth day of the month
second day of the week
13th day of the month
third day of the month
the third day in the month
same day of the month
end of the month
other day of the month
early in the month
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
2nd runner- 4th fastest (slowest) runner.
Wiki
Prithee, forgeteth the fake fakirs and get oneth with the story.
News & Media
"He talketh stupid to letteth you know that though he iseth a well-educated Indian, he iseth stilleth a native and canneth never be oneth of us".
News & Media
12th & 13th Streets last week.
News & Media
52nd & 58th Streets.
News & Media
2nd and 3rd Avenues.
News & Media
11th & 12th Avenues.
News & Media
10th last.
News & Media
& 27th Street.
News & Media
30th issue.
News & Media
5th & Madison.
News & Media
Expert writing Tips
Best practice
Always use "thirty-first" instead of "thirty-oneth". The latter is not a recognized ordinal number in English.
Common error
Avoid creating ordinal numbers by simply adding "th" to the cardinal number. For numbers ending in one, two or three use "-st", "-nd", "-rd" respectively (e.g., "first", "second", "third", "thirty-first", "thirty-second", "thirty-third").
Source & Trust
60%
Authority and reliability
1.2/5
Expert rating
Real-world application tested
Linguistic Context
"Thirty-oneth" is intended to function as an ordinal number, indicating a position in a sequence. However, as noted by Ludwig AI, it is grammatically incorrect and not recognized in standard English.
Frequent in
Science
0%
News & Media
0%
Formal & Business
0%
Less common in
Science
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News & Media
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Formal & Business
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Ludwig's WRAP-UP
In summary, "thirty-oneth" is an incorrect formation of the ordinal number for thirty-one. As highlighted by Ludwig AI, the correct form is "thirty-first". The phrase is absent from standard English corpora and authoritative sources, indicating it should not be used in either formal or informal contexts. Always use "thirty-first" to correctly express the ordinal position.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
thirty-first
This is the correctly formed ordinal number, indicating the position after thirtieth.
31st
A numerical representation of the ordinal number, often used in dates.
the thirty-first item
This specifies that you are referring to the thirty-first item in a series.
the thirty-first day
Refers to the thirty-first day of a month.
number thirty-one
This phrase describes the number in a more verbose way.
the thirty-first instance
Specifies the thirty-first occurrence of something.
the ordinal number thirty-one
More descriptive clarification of the intended position.
in thirty-first place
Specifies the thirty-first position within a rank of items.
thirty and first
Expressing the number with 'and' between, which while uncommon, alludes to breaking down the number.
day thirty-one
Describing the thirty-first day in sequence.
FAQs
How do you correctly write the ordinal form of thirty-one?
The correct way to write the ordinal form of thirty-one is "thirty-first". "Thirty-oneth" is not a recognized form.
What is the difference between "thirty-first" and "thirty-oneth"?
"Thirty-first" is the correct ordinal number indicating the position after thirtieth. "Thirty-oneth" is not a valid word in English.
Can I use "thirty-oneth" in any context?
No, "thirty-oneth" is not grammatically correct and should not be used in any formal or informal context. Use "thirty-first" instead.
Are there any alternative ways to say "thirty-first"?
While "thirty-first" is the standard ordinal form, you can rephrase it as "the thirty-first item" or "the thirty-first day" depending on the context. However, it’s important to always use the correct ordinal form of "thirty-first".
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
60%
Authority and reliability
1.2/5
Expert rating
Real-world application tested