A spring (mechanical device) — a metal component that stores and releases energy.
時計の内部には小さなばねが組み込まれている。
A small spring is built into the inside of the watch.
そのおもちゃはばねの力で飛び上がる仕組みだ。
That toy works by jumping up using the force of a spring.
椅子のばねがへたって座り心地が悪い。
The chair's springs are worn out and it's uncomfortable to sit on.
Bounce or spring in one's legs; elasticity or springiness — the ability to rebound or move with a springing motion.
年を取っても、ばねのある歩き方を保ちたい。
Even when I grow old, I want to keep a springy walk.
彼女のプレーにはいつもばねがある。
Her play always has a spring to it.
子どもは転んでもすぐにばねのように立ち上がる。
Children bounce back like springs even after falling.
An impetus or springboard — something that provides momentum, a starting push, or impetus for action.
海外研修が彼のキャリアのばねになった。
The overseas training became the springboard for his career.
小さな成功が次の挑戦へのばねとなった。
A small success served as the impetus for the next challenge.