brood

To brood is to think deeply about something that troubles you, often for a long time. It is like letting a dark thought simmer and return again and again. But the word also has a second life: it can name a batch of young animals, especially birds, hatched from one laying, and also the action of a bird staying on eggs to keep them warm.

Think of a person on a quiet evening, replaying an insult and feeling moodier with each minute, or of clouds that sit heavy and dark over a field before rain. Or imagine a mother bird in a nest, still and attentive while her chicks warm. Both scenes show the same sense of concentrated, absorbed attention.

The word "brood" carries a clear dual meaning. As a verb, it is often used for intense, repeated thinking that carries emotional weight. Someone who is brooding may revisit the same worry, fear, or regret for a long time and seem silent, tense, or withdrawn. You might "brood" over a poor decision, a misunderstanding, or a personal failure: "She spent the night brooding over the letter, unable to accept what it meant."

As a noun, "brood" refers to a group of young animals born or hatched at the same time, especially chicks, ducklings, or other birds. As a related verb sense, it describes birds incubating eggs by sitting on them until they hatch. This gives the word a second emotional color: the same attentiveness, but protective rather than dark. People also use the term figuratively for a group of human children, though that use is less formal than the natural sense.

The two senses sit side by side because both involve staying close to something: a person stays close to a painful thought, while a parent bird stays close to its nest. Either way, there is a sense of deep focus and sustained attention, whether it turns inward in worry or outward in care.