诣 ⇒
造诣 zàoyì, [造詣], level of mastery (of a skill or area of knowledge)/(archaic) to pay a visit to s...
诣 yì, [詣], to go (to visit a superior)/one's current attainment in learning or art
苦心孤诣 kǔxīngūyì, [苦心孤詣], to make painstaking efforts (idiom); after much trouble/to work hard at sth