indefinable vs undefinable

indefinable and undefinable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
indefinable	No	Yes	No	No
undefinable	No	Yes	No	No

As adjectives, indefinable and undefinable are synonyms defined as:

indefinable and undefinable: not capable of being precisely or readily described; not easily put into words

indefinable (adjective)	undefinable (adjective)
defying expression or description	not capable of being precisely or readily described; not easily put into words
not capable of being precisely or readily described; not easily put into words