To convert into a canal or channel, or to direct something along a specific route or path.
From canal plus the verb-forming suffix -ise (British English). The suffix comes from Greek -izein. Developed in the 18th-19th centuries as engineering terminology.
Engineers 'canalise' rivers not just for navigation but to control flooding and direct water flow—it's literally reshaping nature's own infrastructure. The word shows how verbs can describe transforming an entire landscape.
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