twenty years old

unmarried woman / female virgin (female who has not had sexual experience) / woman's virginity / for the first time; maiden (voyage, publication etc)

処女: A maiden, a virgin. / 初叙: The first time that one is given a court rank or honor. / 庶女: A female commoner. / 沮洳: A bog, a wetland; being boggy due to bad drainage; (slang, rare) jail or prison.

三才: the "three talents": sky, earth and people / 三歳: three years old / 山菜: mountain vegetables; foraged vegetables / 山塞: mountain stronghold; Chinese counterfeit goods

year

-year-old

(nautical) maiden voyage

profitability

(historical) the "three talents": sky (天), earth (地) and people (人) (one who knows all three well would be an all-rounded person) / (figuratively) everything in the universe; all of creation

edible greens of the sort that naturally grows on mountains