The word "in-discernible" is often used to describe something that is difficult to detect or perceive. However, there are other synonyms that can be used to convey a similar meaning. One possible alternative is "indistinct," which suggests that something is unclear or blurred. Another option is "obscure," which conveys the idea that something is hidden or concealed from view. "Unperceivable" is also a possible synonym, highlighting the idea that something cannot be easily perceived. Additional synonyms include "imperceptible," "inconspicuous," and "faint." Ultimately, the choice of synonym will depend on the context and intended meaning of the text.