Middle English enfaunt, from Anglo-French enfant, from Latin infant-, infans, from infant-, infans, adjective, incapable of speech, young, from in- + fant-, fans, present participle of fari to speak — more at ban
To the parent of a crying infant unable to say what the problem is, the etymology of infant might seem very appropriate. In Latin the adjective infans literally meant “not speaking, incapable of speech.” The noun infans referred to a very young child who had not yet learned to talk. Later, however, the scope of infans was broadened to include any child, no matter how talkative. When the word was adopted from Latin into French, and then into English, the broader usage was carried over also. Over time, English went back to the earlier Latin sense, restricting infant to a child still young enough to be called a baby.
Definition of INFANT for Kids
: of or relating to infancy
: intended for young children <infant clothes>
Medical Definition of INFANT
a: a child in the first year of life :babyb: a child several years of age