详细解释:n. 变黑, 黑色
词型变化：
形容词:nigrescent详细解释：
ni.gres.cence
n.（名词）The process of becoming black or dark.变黑：变黑或变暗的过程Blackness or darkness, as of complexion.肤色的黝黑
来源：From nigrescent [blackish] 源自 nigrescent [黑的] from Latin nigrôscôns nigrôscent- [present participle of] nigrôscere [to become black] 源自 拉丁语 nigrôscôns nigrôscent- [] nigrôscere的现在分词 [变黑] from niger nigr- [black] 源自 niger nigr- [黑]
【引伸】
nigres.cent
adj.（形容词）