libri, or codicis.
The Latin masculine noun collis (a hill) has a singular genitive collis and a plural genitive collium.
The Latin masculine noun tumulus (a rounded hill, a burial mound or grave) has the genitive singular tumuli and genitive plural tumulorum.
No. Either genitive singular or nominative plural.
Viri could be the genitive singular or the nominative (or vocative) plural of the Latin vir, a male person; or it might be the genitive singular of virus, a slime or snake venom.
The Latin word for "bone" is "os" (singular) or "ossa" (plural).
Mutationis, which the genitive singular of the noun mutatio "change, alteration."
In Latin, the ending for the genitive plural of the 1st declension noun is -arum: femina, feminarum.
Most/very well known, recognized (feminine genitive singular or feminine nominative plural).
Patris is the genitive singular of the Latin word for "father", pater. It means "of a father" or "of the father". (Latin has no words for "a" or "the", so a translation has to supply them when necessary.)
Omnia is correct; omnis is either a nominative or a genitive singular noun ending.
Regione is the ablative singular form of the Latin word regio, which means "region." Regio is a third-declension feminine noun and has the genitive regionis.
"Vir," meaning "man" in Latin, is a masculine noun of the second declension. Its declension is as follows: nominative singular "vir," genitive singular "viri," dative singular "viro," accusative singular "virum," ablative singular "viro," and the nominative plural "viri." The genitive plural is "virorum," the dative plural is "viris," the accusative plural is "viros," and the ablative plural is "viris."