Tirando is a method of plucking used in Classical guitar and Flamenco guitar. Tirando is Spanish for "pulling." In English, it is also called a "free stroke"). After plucking, the finger does not touch the string that is next lowest in pitch (physically higher) on the guitar, as it does with apoyando).
Since the end of the 20th century, many professional classical guitarists prefer tirando, and have moved away from thinking of apoyando as the basic principle of guitar technique.