undefinable

not capable of being precisely or readily described; not easily put into words; "an indefinable feeling of terror"; "an abstract concept that seems indefinable"

वह अनन्त अपरिभाष्य , परिमाण रहित और अरूप होता हुआ भी विचारगम्य और जगत प्रपंच का अधिष्ठान है।

An undefinable presence had been glimpsed in the innermost apartment of an abode of mystery.