To settle comfortably and snugly into a position; to lie close and snug, as a bird in its nest.
From Old English nestlian, derived from nest. The word has maintained its core meaning of settling into a comfortable, protected position since Old English times, with the metaphorical sense developing naturally.
The famous Swiss company Nestlé chose this name to evoke the comfort and nourishment associated with a bird's nest, with their logo featuring a nest with baby birds. The umlaut in Nestlé reflects the German pronunciation of founder Henri Nestlé's surname.
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