Definitions

1. adjective

too great or complex to be expressed or identified by a name

“The artist struggled to find a name for his unnameable emotions in his latest painting.”

2. adjective

being incapable of being named or identified

“The new species was declared unnameable by the scientific community due to lack of data.”

3. noun

something that is too great or complex to be expressed or identified by a name

“The concept of love is an unnameable feeling that cannot be fully understood.”