| acidify | (verb) turn acidic | Synonyms: acetify |
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| (verb) make sour or more sour | Synonyms: acetify, acidulate, sour |
| codify | (verb) organize into a code or system, such as a body of law | - |
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| dandify | (verb) dress like a dandy | - |
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| dedifferentiate | (verb) lose specialization in form or function | - |
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| dehumidify | (verb) make less humid | - |
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| differ | (verb) be of different opinions | Synonyms: disagree, dissent, take issue |
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| (verb) be different | - |
| differentiate | (verb) become distinct and acquire a different character | - |
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| (verb) become different during development | - |
| (verb) evolve so as to lead to a new species or develop in a way most suited to the environment | Synonyms: specialise, specialize, speciate |
| (verb) calculate a derivative; take the derivative | - |
| (verb) mark as different | Synonyms: distinguish, secern, secernate, separate, severalise, severalize, tell, tell apart |
| (verb) be a distinctive feature, attribute, or trait; sometimes in a very positive sense | Synonyms: distinguish, mark |
| diffract | (verb) undergo diffraction | - |
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| diffuse | (verb) cause to become widely known | Synonyms: broadcast, circularise, circularize, circulate, disperse, disseminate, distribute, pass around, propagate, spread |
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| (verb) spread or diffuse through | Synonyms: imbue, interpenetrate, penetrate, permeate, pervade, riddle |
| (verb) move outward | Synonyms: fan out, spread, spread out |
| edify | (verb) make understand | Synonyms: enlighten |
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| humidify | (verb) make (more) humid | Synonyms: moisturise, moisturize |
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| lapidify | (verb) change into stone | Synonyms: petrify |
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| modify | (verb) make less severe or harsh or extreme | - |
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| (verb) add a modifier to a constituent | Synonyms: qualify |
| (verb) cause to change; make different; cause a transformation | Synonyms: alter, change |
| rigidify | (verb) become rigid | - |
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| (verb) make rigid and set into a conventional pattern | Synonyms: ossify, petrify |
| solidify | (verb) become solid | - |
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| (verb) make solid or more solid; cause to solidify | - |