ぼそぼそ;ボソボソ /(adv,adv-to,vs) (1) (on-mim) in a subdued voice/in undertones/in a whisper/in a mumble/in a murmur/(adv,adv-to,vs,adj-na) (2) (on-mim) dry and tasteless/stale/EntL1632630/