transitive (in passive). Of a fact, opinion, etc.: to be strongly or forcibly fixed in (a person's mind, conscience, etc.); to be impressed on or upon…
figurative. In the phrase to speak (also express, tell) volumes, to be highly expressive or significant.
intransitive. To become perspicuous or lucid.
intransitive. With reference to various elements combining effectively. To become clear, coherent, or understandable; to begin to make sense.