哀史[aishi] sad story or history
医学史[igakushi] history of medicine
音楽史[ongakushi] music history
偽史[gishi] falsified history
教会史[kyoukaishi] church history

近代史[kindaishi] modern history
古史[koshi] ancient history
古代史[kodaishi] ancient history
国史[kokushi] history of a nation
史家[shika] historian

秘露[peruu] Peru
極秘[gokuhi] absolute secrecy
軍事秘密[gunjihimitsu] military secret
厳秘[genpi] strict secret
公然の秘密[kouzennohimitsu] open secret

社外秘[shagaihi] company secret
神秘[shinpi] mystery
神秘学[shinhigaku] occultism (Western)
神秘的[shinpiteki] mysterious
秘める[himeru] to hide