burgeon [ˈbɜ:dʒən]

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vt.&vi.萌芽，发芽；迅速发展

grow and flourish;

Seeds begin to burgeon at the commencement of spring. 春天开始时种子开始发芽。
Plants burgeon from every available space. 只要有一点空隙，植物就会生根发芽。