Those childhood memories, though forgotten, still exist in his subconsciousness and influence his decisions.

subconsciousness 是由前缀 sub-（表示"在...之下"）和 consciousness（意识）组成的复合名词。sub- 表示"低于"或"在...之下"，consciousness 指"意识、知觉"。subconsciousness 合起来表示"潜意识"，即那些存在于意识层面之下但仍能影响行为的心理活动。