Abba
   This Syriac or Chaldee word is found three times in the New
   Testament (Mark 14:36; Rom. 8:15; Gal. 4:6), and in each case is
   followed by its Greek equivalent, which is translated "father."
   It is a term expressing warm affection and filial confidence. It
   has no perfect equivalent in our language. It has passed into
   European languages as an ecclesiastical term, "abbot."