I. adjective
Synonyms: bottomless 2, abysmal, fathomless, plumbless, plummetless, unfathomable
Antonyms: soundable
II. adjective
Synonyms: still 3, hush, hushful, noiseless, quiet, silent, stilly, whist
I. adjective
Synonyms: bottomless 2, abysmal, fathomless, plumbless, plummetless, unfathomable
Antonyms: soundable
II. adjective
Synonyms: still 3, hush, hushful, noiseless, quiet, silent, stilly, whist
Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003