想象的名词的英语单词是 "imaginary"。这个词来源于拉丁语 "imaginarium"，意思是"想像"或"想象力"。

例句：

The children used their imagination to create an imaginary world in the backyard. (孩子们用他们的想象力在后院创造了一个想象世界。)
The imaginary creatures in the book were so vivid and colorful that I felt pke I was right there with them. (书中的想象生物那么生动多彩，我感觉就像是和它们在一起。)
She has an active imagination and is always coming up with new and interesting ideas. (她有着丰富的想象力，总是想出新颖有趣的主意。)