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fundamental; radical; pucka; pukka; essential (e-nterpreter); foundational (Александр Рыжов); pioneering; rock-bottom (‘a pure, rock-bottom kind of realism' Bullfinch); ultimate (the ultimate nature of things  merriam-webster.com kriemhild); sturdy; thorough (of knowledge); profound; basic (of research, a work, study, etc.); base | |||
| sound | |||
| landmark | |||
| deep | |||
| elementary; prime | |||
| octava superieure | |||
| thoroughgoing | |||
| basic | |||
| basal; basis; elemental; fundamental (о науках); academical (противоп. прикладному; о науках) | |||
| solid; substantial; main | |||
| academic (о науке I. Havkin) | |||
| gut | |||
| seminal (о научном труде, исследовании и т.п.) | |||
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| fundamentally (ssn); radically | |||
| deep down (Interex) | |||
| фундаментальный: 604 phrases in 80 subjects |