Yes, "witness" is a noun. It refers to a person who has seen an event take place or has evidence of something.
The plural possessive form of "witness" is "witnesses'".
The possessive form of the singular noun judge is judge's.Example: The witness had the judge's complete attention.
The possessive singular form of "witness" is "witness's."
The word for witness stand is "testimony stand" or "witness box."
One who can give a firsthand account of something seen, heard, or experienced:a witness to the accident.The witness went at the court to provide informations about the accident.
Testificar (the verb "to witness"). Un testigo (noun: a witness).
The plural possessive form of "witness" is "witnesses'".
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 word "wit" can be a noun or a verb. As a noun, it refers to intelligence, cleverness, or humor. As a verb, it means to humorously or cleverly say something.
The plural form of the noun witness is witnesses.examples: The list of witnesses was sent to the defendant's counsel.
The possessive form of witness is witness's
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 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 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.)
Unlike "witness's", the spoken usage of "witnesses" does not normally include an extra (third) sibilant, and may be written "witnesses' ." The "s" after the apostrophe has, however, been noted regarding possessives of "Jehovah's Witnesses".
The word 'question' is both a noun and a verb. Example uses:Noun: I can answer your question.Verb: The defense may question the witness.
The possessive form of the singular noun judge is judge's.Example: The witness had the judge's complete attention.