age when a child is most adorable
Archaic noun referring to the period in childhood when a child is considered especially lovable or endearing. Not used in modern Japanese; encountered only in historical or literary contexts.
People in the past are said to have felt lonely once their child passed the most adorable age.
Compound of 愛 (ai, 'love') and 盛り (zakari, 'peak' or 'prime'), literally 'peak of love'. The exact historical derivation is uncertain; it appears in older Japanese texts referring to a child's most endearing stage.