Where does “használatlan” come from?

használatlan (Hungarian) comes from Hungarian használ, from Hungarian -ál, from Hungarian -l, from Proto-Uralic -l.

használatlan (Hungarian): unused

Definitions

Step	Language	Word	Meaning
1	Hungarian	használ	to use; to benefit, to provide a benefit; to take...
2	Hungarian	-ál	Same as -l with the "-á-" linking vowel. Used for...
3	Hungarian	-l	Appended to a noun, an adjective or less...
4	Proto-Uralic	-l	—