indescribablein‧de‧scri‧ba‧ble /ˌɪndɪˈskraɪbəbəl◂/ adjective 
- Fresh salmon has an indescribable flavor.
- I woke up on the day after my wedding with a feeling of indescribable joy.
- The chaos and confusion was indescribable.
- But the experience itself is essentially non-rational and indescribable.
- The sky, that had been so grey and lowering, was iridescent with indescribable beauty.
- Then I skipped down the entry ladder with indescribable relief.
- There is a space around it, an indescribable presence.
- There is an indescribable sense of community here.
- Unlimited discomfort would of course be indescribable.
when it is difficult to express ideas or feelings in words► can't express · She couldn't express how happy and relieved she was.· I cannot express my gratitude for your kindness.words can't express · Words can't express the terrible grief I felt on losing my daughter.
► be difficult/hard to describe to be difficult to express what a feeling, experience, taste etc is like in words: · The atmosphere of tension and nervousness here is hard to describe.· The sound the bird makes is difficult to describe -- it's a bit like scissors opening and closing rapidly.
► indescribable if emotions, situations etc are indescribable , they are so terrible, so good, or so strange that you cannot describe them properly: · The chaos and confusion was indescribable.indescribable joy/peace/horror/sadness etc: · I woke up on the day after my wedding with a feeling of indescribable joy.
► inexpressible formal an inexpressible emotion is one that is too strong to be described in words: · Looking up into his concerned brown eyes, I had felt an inexpressible sense of relief.inexpressible anger/gratitude/joy/longing etc: · And then, to her almost inexpressible joy, she saw the familiar tall, broad-shouldered figure across the station.
adjectivedescribable ≠ indescribablenondescriptdescriptivenoundescriptionverbdescribeadverbdescriptively
a feeling of indescribable joy—indescribably adverb: