幼児

(1)a very young mammal; "baby rabbits"

(2)非常に若い哺乳類

(3)an immature childish person; "he remained a child in practical matters as long as he lived"; "stop being a baby!"

(4)未熟で子供じみた人

(5)a very young child (birth to 1 year) who has not yet begun to walk or talk; "the baby began to cry again"; "she held the baby in her arms"; "it sounds simple, but when you have your own baby it is all so different"

(6)非常に年の若く（生後1年までの）、まだ歩いたり話したりできない子供

(1)