Answer:
Locked
Step-by-step explanation:
A free morpheme is a morpheme that can be used as a separate word. Some roots are free morphemes, which means that they can be used independently, without other morphemes, and still make sense. Roots that can't be used as separate words are considered locked.
The word fraction consists of the root fract and suffix -ion. The word fract can be found in some dictionaries, but it's marked as obsolete, which means that it's no longer used and that most people won't understand it. It used to be an adjective and verb with the following meaning:
- Adjective - broken or cracked;
- Verb - to break or to crack.
As it's no longer used independently, the root fract is now locked.