loud enough

deafening detectable discernible distinct loud perceptible resounding sounding

clear hearable plain roaring

aural auricular within earshot

ambiguous indistinct invisible obscure unnoticeable vague

obscured unclear

inaudible

clear-cut coherent definite distinct evident explicit obvious precise sharp simple straightforward transparent unambiguous unequivocal unmistakable

crystal express manifest patent plain pronounced

apprehensible comprehensible conspicuous graspable incontrovertible intelligible knowable legible lucent lucid open and shut palpable perceptible perspicuous readable recognizable spelled out transpicuous unblurred uncomplicated unquestionable

ambiguous complicated difficult equivocal fuzzy imprecise indefinite indistinct inexact mistakable obscure questionable uncertain unclear undefined unintelligible unsure vague

concealed hidden

mysterious obscured shadowy