pungent
bitter
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→xin1ku3 • xīnkǔ
hard
work hard, to work hard, harsh
他 辛苦 地 完成 了 任务。
He worked hard to complete the task.
你 辛苦 的 努力 终于 有 了 回报。
Your hard work has finally paid off.
学习 新 语言 很 辛苦， 但 值得。
Learning a new language is hard, but it's worth it.