不佳 This is how Henry Holiday imagined that the Boojum might look like: How would Chinese call the Boojum? Boojum can be translated with 不佳 (bù jiā). The pronouncation in English is explained to Chinese people in fanyi.baidu.com. I also found 布经 (bù jīng) as a Chinese translation. As for vanishing away, one also could consider to use 不见 (bù jiàn).