秘密【ひみつ】
secret, secrecy, confidentiality, privacy, mystery, secret (e.g. to success), esoteric teachings
秘書【ひしょ】
(private) secretary, treasured book, secret book
秘める【ひめる】
to hide, to keep to oneself
秘訣【ひけつ】
secret (method, trick, etc.), key (e.g. to success), mysteries (of an art, trade, etc.), recipe, trick
神秘【しんぴ】
mystery, mysteriousness, secret
神秘的【しんぴてき】
mysterious, mystical
便秘【べんぴ】
constipation
黙秘権【もくひけん】
right to keep silent, right to silence, right to remain silent
秘話【ひわ】
secret story, unknown episode
黙秘【もくひ】
remaining silent, keeping secret
秘境【ひきょう】
unexplored region, secluded region, place off the beaten track
秘策【ひさく】
secret plan, secret scheme, secret stratagem, secret method
秘蔵【ひぞう】
treasuring, cherishing, prizing, holding dear
秘伝【ひでん】
secret (recipe, medicine, etc.), mysteries (e.g. of an art)
秘匿【ひとく】
hiding, concealment