'sectorize' originates from English, specifically the word 'sector' combined with the suffix '-ize', where 'sector' ultimately comes from Latin 'sector' (from 'secare' meaning 'to cut') and the suffix '-ize' comes via Greek '-izein' through Latin/French meaning 'to make or to cause to be'.

'sector' changed from Latin 'sector' (from 'secare') and Old French/Medieval Latin forms into the modern English 'sector'; the productive English suffix '-ize' (from Greek '-izein' through Latin/French '-iser') was attached to form 'sectorize' in modern English usage.

Initially formed to mean 'to make into sectors' or 'to cut/divide into sectors'; over time it has come to be used more broadly for organizing, allocating, or classifying into sectors in administrative, economic, or spatial contexts.