IPA: //ˈnæʃənəlaɪz//
KK: /ˈnæʃənəlaɪz/
To change a private business or industry so that it is owned and controlled by the government instead of private individuals.
The government decided to nationalise the railway system to improve public transport.
Past: nationalised
Past Participle: nationalised
Nationalise → It is formed from "nation" (from Latin *natio*, meaning birth or race) and "-al" (meaning pertaining to) combined with "-ise" (a suffix used to form verbs). The word "nationalise" means to make something pertaining to a nation, often referring to the transfer of ownership to the state.
Think of 'nation' as relating to a group of people born in the same place, and when you 'nationalise' something, you are making it part of that nation.