adj

• (Not) advanced in age; (far towards or) at a specified stage of existence or age.
  "And thou, our Mother, twice two centuries young, Bend with bright shafts of truth thy bow fresh-strung."
• (obsolete) Having little experience; inexperienced; unpracticed; ignorant; weak.
  "Come, come, elder brother, you are too young in this."

noun

• (often as if a plural noun) Offspring, especially the immature offspring of animals.
  "The lion caught a gnu to feed its young."

verb

• (informal or demography) To become or seem to become younger.
  "The aging (or younging) of a population refers to the fact that a population, as a unit of observation, is getting older (or younger)."
• (informal or demography) To cause to appear younger.
  "Medicare data was "younged" by a month to achieve conformity with the conventional completed ages recorded in the census."
• (geology) To exhibit younging.
  "Shoshonitic magmatism younged southwards in the Superior Province, commensurate with the southwardly diachronous accretion of allochthonous subprovinces."