There are two accepted forms that show possession for singular nouns ending in s:
Add an apostrophe (') after the existing s at the end of the word:
Examples:
The witness' testimony seemed plausible.
The witness's testimony seemed plausible.
The plural form of the noun witness is witnesses.The plural possessive form is witnesses'.example: All of the witnesses' statements were added to the police report.
There are two accepted forms for possessive singular nouns that end with an s:Add an apostrophe (') after the existing s at the end of the word:witness'Add an apostrophe s ('s) after the existing s at the end of the word: witness'sExamples:The witness' statement was added to the police report.The witness's statement was added to the police report.Note: If you are a student, use the form that is preferred by your teacher.Because you will add an S sound to form the possessive, most style guides recommend the apostrophe S rather than the apostrophe alone, especially for common nouns.
The possessive witness's pertains to something associated with a singular witness. The possessive witnesses' pertains to association with more than one individual witness (witnesses). (The exception here is for the plural ending in 's', which allows omission of the additional possessive 's', for written clarity and ease of pronunciation. Note that the singular possessive is pronounced identically to the plural AND plural possessive.)
The possessive form of the word "dictionary" is "dictionary's."
The possessive form for the word 'word' is word's.
The plural form of the noun witness is witnesses.The plural possessive form is witnesses'.example: All of the witnesses' statements were added to the police report.
The plural possessive form of "witness" is "witnesses'".
As written in the question, 'wittiness' is an abstract noun to the state of being witty, and thus does not have a possessive form. If the writer meant 'witness', the possessive may be written as witness's or witness', both are accepted forms.
The singular form for the plural noun witnesses is witness; the singular possessive is witness'.Example: The witness' bag was snatched as she walked away.
The possessive form of witness is witness's
There are two accepted forms for possessive singular nouns ending in s:Add an apostrophe (') after the existing s at the end of the word: witness'Add an apostrophe s ('s) after the existing s at the end of the word: witness'sExamples:The witness' statement was added to the police report. The witness's statement was added to the police report.Note: If you are a student, use the form that is preferred by your teacher.
The singular possessive form is word's, for example the word's definition.
The possessive form of the singular noun judge is judge's.Example: The witness had the judge's complete attention.
possessive form of the word Cathi: Cathi's
possessive form of the word glass: glass'
possessive form of the word Congress: Congress'
possessive form for the word holders: holders'