very modern
The new jet pack is a futuristic device that lets one man fly around like an astronaut.

not real; existing only in the mind
Centaurs, griffons, and elves are all imaginary creatures.

불가능, 불가능한 일
When she thought about all the impossibilities, Sara realized that the strange solution must be the right one.

중편 소설
Herman Melville wrote Billy Bud, a famous novella.

based on a guess and not on information
The stock market is highly speculative, with people just hoping about the future.

being unable to be explained by natural causes and science and seeming to involve the MAGICAL or godly powers
supernatural forces are those that cannot be explained by the natural world.