秘ひひ○Freq.FrequencyTop 10,000Meanings1nounsecret; mysteryrare termRare standalone noun; mostly encountered in fixed expressions like 秘中の秘 (secret of secrets).See also: 秘中の秘「秘ひ中ちゅうの秘ひ」という表ひょう現げんで使つかわれることがある。It is sometimes used in the expression 秘中の秘 (secret of secrets).
