Use 'warty' to describe living things or objects that have wart-like textures. The bark of that tree is quite warty.
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Visual Imagery
'Warty' often evokes a vivid, tactile image, which can be applied to enhance description in storytelling. She touched the warty gourd, feeling its textured surface.
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Neutral Connotation
'Warty' is usually neutral but can seem negative if associated with unattractive features. The warty appearance of the squash doesn't affect its taste.