To make something giant in size; to enlarge something greatly or cause it to become enormous.
From 'giant' + '-ize' (a productive suffix meaning 'to make' or 'to cause to become'). The '-ize' suffix comes from Greek '-izein' and became common in English technical and scientific terminology.
While 'giantize' is not commonly used, it appears in science fiction and fantasy writing—authors need verbs to describe transformation into giants, just like 'roboticize' or 'digitize' describe other speculative changes.
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