I. adjective Etymology: 6sound Date: circa 1586 incapable of being sounded ; unfathomable , II. adjective Etymology: 3sound Date: 1601 making no sound ; silent , ~ly adverb
SOUNDLESS
Meaning of SOUNDLESS in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012