The word "infant" refers to a very young child, typically a baby who is not yet able to walk or talk. Infants are generally considered to be aged from birth up to about one year old. During this period, they rely heavily on caregivers for nutrition, care, and emotional support as they undergo rapid growth and development.
The word "infant" comes from the Latin word "infans," which means "unable to speak" (from "in-" meaning "not" and "fans," the present participle of "farere," meaning "to speak"). This reflects the state of very young children who have not yet developed the ability to talk.