FATHER — and Aramaic, not Greek, which is the point. It survives in the New Testament only three times (Romans 8:15, Galatians 4:6, Mark 14:36) and every single time it is IMMEDIATELY TRANSLATED: 'Abba, ho pater'. Nobody doubles a word that needs no gloss, so the likeliest explanation is that the Aramaic had become fixed in Greek-speaking congregations as something they actually SAID — a loan-word out of the prayer life of the earliest church, kept because it was used. One of the very few places where the sound of first-century prayer survives. ⚠ It does NOT mean 'daddy'; that popular claim rests on a mid-twentieth-century argument its own author later withdrew. It is ordinary intimate address, not baby-talk. → first discussed at Rom 8:15