graded adjective & adjective Something that is indistinct is unclear and difficult to see, hear, or recognize. ⇒ The lettering is fuzzy and indistinct. ⇒ ...the indistinct murmur of voices. indistinctly
graded adverb & adverb [ADV after v] ⇒ He speaks so indistinctly that many listeners haven't a clue what he is saying.
COBUILD Advanced English Dictionary. Copyright © Harper Collins Publishers