younger

形容词 younger:

used of the younger of two persons of the same name especially used to distinguish a son from his father

同义词：jr.

形容词 young:

(used of living things especially persons) in an early period of life or development or growth

同义词：young, immature

(of crops) harvested at an early stage of development; before complete maturity

同义词：new, young

suggestive of youth; vigorous and fresh

being in its early stage

同义词：young

not tried or tested by experience