ABSTRUSE Meaning of ABSTRUSE in English [ əb'stru:s ]■ adjective difficult to understand.Derivatives~ly adverb~ness noun OriginC16: from L. abstrus- , abstrudere 'conceal', from ab- 'from' + trudere 'to push'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004