na-adjective, noun
small and weak; puny; minor
Describes organizations, teams, or entities that are both small in scale and lacking in power or influence. Often used in contrast to 強大 (きょうだい, 'powerful and large'). The gloss 'youth' is a rare, context-dependent extension referring to young, inexperienced individuals or groups.
その弱小チームが強豪を破った。
That small, weak team beat the powerhouse.
弱小企業は大手との競争に苦しんでいる。
Small, weak companies are struggling to compete with major corporations.