n. 25B6; adjective UNSHAKEABLE, immovable, inflexible, unwavering, unswerving, uncompromising, resolute, resolved, determined, firm, steadfast; stubborn, unrelenting, unyielding, unbending, rigid, obdurate, inexorable, intransigent, dead set.
ADAMANT
Meaning of ADAMANT in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012