A shrivel occurs when something dries up and gets smaller.
When things go wrong or don't get enough care, they can start to shrivel. This often happens with plants that are thirsty or don't have enough sunlight. Imagine a beautiful flower that once bloomed beautifully but now its petals are dry and wrinkled because it hasn't had enough water - that's what we mean by shriveling.
To collapse inward; to crumble.
Example: The plant shrivelled from lack of water.
