in a careful and well-considered way that avoids risk: He moved slowly and cautiously along the dark rocky path. She said cautiously, "You may be right." He urged the company to proceed cautiously with changes.

Speak loudly enough for everyone to hear. While you don't want to shout, you should speak loudly enough so that people don't have to ask you to repeat yourself. Speaking quietly or softly will make people think you are shy and that you don't have confidence in what you're saying -- that you don't really want to be heard anyway.