ADJ-GRADED [ADJ n](尤指不好的事情)无以名状的,难以形容的,莫名的 You can use unutterable to emphasize that something, especially a bad quality, is great in degree or intensity. (尤指不好的事情)无以名状的,难以形容的,莫名的 [written, emphasis]
I am at the beginning of a new and unutterable loneliness.