A child does not know what they are feeling. This is not a deficit. This is the default state of being a child, and for most of human history it was also the default state of being an adult. The capacity to name an internal state with a specific word is a learned skill, transmitted from parent to child mostly through repetition, and almost entirely through example. If you do not name your feelings out loud, your child will not have the vocabulary to name theirs. If you name only the pleasant ones, your child will learn that the unpleasant ones are unspeakable. If you name them with precision, your child will inherit a precision instrument. If you name them in clichés, your child will inherit clichés. Whatever you do with your own emotional vocabulary in front of your child, your child will probably do for the rest of their life.
The work has two halves and they are equally important. The first half is naming the child's feelings for them, accurately, in the moment, without performing it. "You look frustrated." "I think you're disappointed." "That seems scary to you." The child hears the word attached to the sensation and, over many repetitions, comes to be able to attach the word themselves. This is not magic; it is the basic mechanism of language acquisition applied to interior states. The child learns "tree" by hearing "tree" while looking at a tree. They learn "embarrassed" by hearing "embarrassed" while feeling something hot in their face that they did not previously have a word for.
The second half is naming your own feelings out loud, in front of your child, without dramatizing them. "I'm frustrated right now. I need a minute." "I'm sad about what happened to grandma." "I feel anxious about this trip even though I'm looking forward to it." This is harder than naming the child's feelings, because most adults have a thin emotional vocabulary themselves and a strong cultural prohibition against using it in front of children. The prohibition is wrong. Children do not need to be protected from the existence of adult emotion; they need to see adults handling emotion in ways that are recognizable, contained, and survivable. The parent who never mentions their feelings is not protecting the child. They are teaching the child that feelings are shameful enough to require concealment.
There are pitfalls. Naming feelings becomes harmful when it is used as a manipulation, a performance, or a substitute for action. "I'm so disappointed in you" used as a weapon, repeated until the child reorganizes their behavior around not disappointing the parent, is the corruption of the practice. Naming a feeling for a child while clearly not believing your own naming, in a sing-song therapy-voice, is detectable from across a room and produces the opposite of the intended effect. The naming has to be honest, the affect has to match the word, and the moment has to be allowed to exist without an attached fix. If you say "you look frustrated" and then immediately try to solve the frustration, you have not named anything. You have used the naming as a setup for the intervention.
The deeper purpose of naming is the construction of an interior. A child who has been helped to name their feelings, year after year, develops an internal map of their own emotional terrain. They can tell the difference between disappointed and rejected, between angry and overwhelmed, between scared and ashamed. These distinctions are not academic. The capacity to make them is the foundation of every adult skill that has anything to do with managing oneself: decision-making, conflict, intimacy, work, parenting in turn. A child without this vocabulary grows up using a small set of crude categories — "good," "bad," "fine," "whatever" — to describe a complex inner life, and the mismatch produces lifelong dysregulation. The adult vocabulary is, in this sense, the consequence of the childhood naming, and the childhood naming is the consequence of the parent's willingness to speak about what is hard.
Precision matters more than positivity. The temptation, especially for parents who have read some parenting literature, is to teach the child the regulated, pleasant words: calm, happy, grateful, content. These are useful, but a child needs the rough words too: livid, mortified, crushed, exhausted, exposed, lonely, jealous, ashamed. The child has these states. They will have them whether or not you give them the words. Without the words, the states will be acted out. With the words, the states can be spoken. This is one of the central differences between an emotionally articulate adult and a dysregulated one: not whether they have the feelings, but whether they have the language.
The practice, sustained over years, accomplishes something that no single conversation can: it builds, in your child, the assumption that interior states are sayable. This assumption is rare, and most people do not have it. Adults who do not have it spend large portions of their lives in confused, unspoken affective storms, knowing something is wrong but unable to locate or name it. The inheritance you can give your child is the contrary assumption, that the inside is articulable, that there is a word for what they are feeling, and that the speaking of the word is the beginning of being able to do something with it. This is one of the most durable gifts of parenting, and almost all of it is built sentence by sentence, in ordinary moments, by a parent willing to say the words.