资料来源 : pyDict

发黑的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Nigrescent \Ni*gres"cent\, a. [L. nigrescens, p. pr. of
   nigrescere to grow black, fr. niger black. See {Negro}.]
   Growing black; changing to a black color; approaching to
   blackness. --Johnson.