Meaning of BASIS in English
n. 25B6; noun
the basis of his method : FOUNDATION, support, base; reasoning, rationale, defence; reason, grounds, justification, motivation.
the basis of discussion : STARTING POINT, base, point of departure, beginning, premise, fundamental point/principle, principal constituent, main ingredient, cornerstone, core, heart, thrust, essence, kernel, nub.
on a part-time basis : FOOTING, condition, status, position; arrangement, system, method.
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012