front-matter (noun) front matter: preliminary pages
Sinonime: Delphian, Delphic,
abstruse,
ambiguous,
apocryphal,
arcane, cabalistic,
dark, enigmatic,
equivocal,
esoteric,
evasive,
hidden, incomprehensible,
inexplicable,
murky, mysterious,
mystic,
mystical, mystifying,
occult,
opaque, oracular,
perplexing, puzzling,
recondite,
secretive, strange,
tenebrous,
unclear, unfathomable, uninformative,
vague, veiled
Antonime: clear,
obvious,
plain, seen,
straightforward