To make accustomed; to accustom (a less common variant, often with the added -ize suffix for emphasis or formality).
From accustom with the addition of -ize, a productive suffix that creates verbs. The -ize suffix often adds a sense of 'making' or 'causing to become' more formally than the base verb.
The -ize suffix often makes verbs sound more technical or formal—compare 'accustom' (everyday) with 'accustomize' (more official-sounding), a pattern seen in pairs like 'use' vs. 'utilize.'
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