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decommission

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verb [transitive] American English pronunciation: decommission /ˌdikəˈmɪʃ(ə)n/ 
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present tense
I/you/we/theydecommission
he/she/itdecommissions
present participledecommissioning
past tensedecommissioned
past participledecommissioned

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major on (doing) sth

to have or do a lot of something; to focus on a particular thing

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