unsounded
adj. 未经探测的；不发音的；未说出的
近义词：bottomless，unplumbed，mysterious，unfathomable，enigmatic，unexplored，unknowable，incomprehensible，silent，unfathomed，profound，
英英释义
Adjective
- situated at or extending to great depth; too deep to have been sounded or plumbed;
"the profound depths of the sea" "the dark unfathomed caves of ocean" "unplumbed depths of the sea" "remote and unsounded caverns"
- not made to sound;
"the silent `h' at the beginning of `honor'" "in French certain letters are often unsounded"