What is the possessive of the word lass?

Answer 1

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: lass'

Add an apostrophe s ('s) after the existing s at the end of the word: lass's

examples:

The lass' mother took her by the hand.

The lass's mother took her by the hand.

Note: The -s's is the most commonly used form, but if you are a student, use the form that is preferred by your teacher.

Answer 2

The possessive form of "lass" is "lass's."