will-o'-the-wisp

US /ˌwɪl.oʊ.ðəˈwɪsp/
UK /ˌwɪl.oʊ.ðəˈwɪsp/
"will-o'-the-wisp" picture
1.

api hantu, will-o'-the-wisp

a faint, flickering light seen at night over marshy ground, believed to be caused by combustion of natural gases

:
The hikers reported seeing a mysterious will-o'-the-wisp in the swamp.
Para pendaki melaporkan melihat api hantu misterius di rawa.
Folklore often describes the will-o'-the-wisp as leading travelers astray.
Cerita rakyat sering menggambarkan api hantu sebagai penyesat para pelancong.
2.

khayalan, sesuatu yang sulit dicapai

something that is impossible or difficult to achieve or catch

:
Chasing perfection can be a will-o'-the-wisp.
Mengejar kesempurnaan bisa menjadi sesuatu yang sulit dicapai.
His promise of a quick solution turned out to be a mere will-o'-the-wisp.
Janjinya tentang solusi cepat ternyata hanya khayalan belaka.