noun
quick method; shortcut; royal road
Refers to a method that achieves a goal faster than usual, often in learning or skill acquisition. 'Royal road' is a figurative translation for an easy, direct path.
語学の速成法はないと言われる。
It is said that there is no shortcut to learning a language.
彼は速成法でピアノを習得した。
He mastered the piano through a quick method.