赤ちゃん
あかちゃん · akachan · JLPT N4 · noun
baby
👶🍼 赤 (aka) = red + ちゃん (chan) = dear little one: little red one
Etymology: newborns have reddish skin, so Japanese calls them aka (red) plus the affectionate suffix -chan. The same idea appears in the formal word 赤ん坊 (akanbō). Red + cute suffix = baby.