To make something very large or to grow to giant proportions.
From 'gigant-' (from Greek gigas, meaning giant) + '-ize' (suffix meaning to make or become). This modern formation combines classical Greek roots with productive English verb-forming suffixes.
Scientists actually use 'gigantize' when discussing why some island creatures evolved to enormous sizes—think giant Galápagos tortoises. The same evolutionary process that gigantizes animals can also miniaturize them when resources are scarce!
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