How to Use Apostrophes with Words Ending in ‘S’, ‘Z’ or ‘X’

Using apostrophes with possessive nouns gets a little more confusing when the noun ends in a sibilant (an s, z or x sound). These nouns might end in one of those letters, or they might also end in se, ze, ce or xe.

The rules

Common nouns ending in an s, z or x sound should generally take an apostrophe and an s when indicating…