First of all, some people treasure certain possessions since they are valuable in its literal meaning, like diamonds or gold.

literal 是形容词，来自名词 letter（字母），字面意思是"与字母有关的"，引申为"字面的、不夸张的"。literal meaning 指"字面意思"，即词语最直接、最基本的意思，不含比喻或引申含义。