develop：发展

de-, 不，非，使相反。-velop, 裹，围住，词源同envelop,wind.即去除限制使发展。

develop：开发，发展；制订，研制；产生，患(病等)；详尽阐述，发挥；显(影)

来源于古法语desvoloper,由前缀des-(否定)和voloper(包裹)组成。

词根词缀：de-去掉 + -velop-包,裹住→去掉包封后才能"发展"、"患病"、"显影"等

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