English version

retrofit

From Longman Dictionary of Contemporary Englishretrofitret‧ro‧fit /ˈretrəʊfɪt $ -troʊ-/ verb (retrofitted, retrofitting) [transitive]  to improve a machine, piece of equipment, building etc by putting new and better parts in it after it has been used for some time plans to retrofit oil boilersretrofit noun [countable]retrofitting noun [uncountable]→ See Verb table
Examples from the Corpus
retrofitSome manufacturers are already offering to retrofit old models with catalytic converters.The latest build is air-conditioned, and following the final deliveries Adtranz is to retrofit the earlier cars with full air-conditioning.
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Verb table
retrofit
Simple Form
Present
I, you, we, theyretrofit
he, she, itretrofits
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Past
I, you, he, she, it, we, theyretrofitted
Present perfect
I, you, we, theyhave retrofitted
he, she, ithas retrofitted
Past perfect
I, you, he, she, it, we, theyhad retrofitted
Future
I, you, he, she, it, we, theywill retrofit
Future perfect
I, you, he, she, it, we, theywill have retrofitted
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Continuous Form
Present
Iam retrofitting
he, she, itis retrofitting
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you, we, theyare retrofitting
Past
I, he, she, itwas retrofitting
you, we, theywere retrofitting
Present perfect
I, you, we, theyhave been retrofitting
he, she, ithas been retrofitting
Past perfect
I, you, he, she, it, we, theyhad been retrofitting
Future
I, you, he, she, it, we, theywill be retrofitting
Future perfect
I, you, he, she, it, we, theywill have been retrofitting
> View Less