noun
1.
Synonyms: reason 3, argument, ground, proof, wherefore, whyfor
2.
Synonyms: mystery , Chinese puzzle, closed book, conundrum, enigma, mystification, puzzle, puzzlement, riddle
noun
1.
Synonyms: reason 3, argument, ground, proof, wherefore, whyfor
2.
Synonyms: mystery , Chinese puzzle, closed book, conundrum, enigma, mystification, puzzle, puzzlement, riddle
Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003