The term 'BARELY AUDIBLE' can be described by four words and one musical term found in a crossword puzzle. The first word is 'PEEP', which is a soft, high-pitched sound made by a bird or other small animal. The second word is 'SIGH', which is an expression of sadness or disappointment. The third word is 'LOW', which means having a LOW pitch or volume. The fourth word is 'FAINT', which means barely perceptible or difficult to hear. The final word is 'PIANISSIMO', which is a musical term meaning very soft or quiet. All of these words together describe the term 'BARELY AUDIBLE', which means barely audible or almost inaudible.