faintest

feɪnt

adjective

(of a sight, smell, or sound) barely perceptible.

the faint murmur of voices

indistinct,vague,unclear,indefinite,ill-defined,obscure,imperceptible,hardly noticeable,hardly detectable,unobtrusive,pale,light,faded,bleached,quiet,muted,muffled,stifled,subdued,feeble,weak,thin,whispered,murmured,scarcely audible,scarcely perceptible,hard to hear,hard to make out,low,soft,gentle