The action of the verb to sound.

Emitting a sound. / Sonorous.

present participle of sound

Test made with a probe or sonde. / A measured depth of water. / The act of inserting of a thin metal rod into the urethra of the penis for medical or sexual purposes

plural of sounding

Full of sound; melodious

plural of soundness

Healthy. / Complete, solid, or secure. / (mathematics, logic) Having the property of soundness. / (Britain, Ireland, slang) Good; acceptable; decent. / (of sleep) Quiet and deep.

Soundly.

(Britain, Ireland, slang) Yes; used to show agreement or understanding, generally without much enthusiasm.