Simple past tense and past participle of winterise.(verb)
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Use "winterised" in a sentence
"Never mind that Jeremy Clarkson could have done the whole trip in a weekend and used motorised drills and possibly some winterised equipment so it carried on working in the ... winter."
"Once there, a four-man team stored the equipment and "winterised" it to cope with the incredibly low temperatures to come."
"Where possible, snow should be removed from boat roofs, and they should be winterised as much as possible as engines are at risk from frost damage."