ἀββᾶ
From LSJ
οὐδ' ἄμμε διακρινέει φιλότητος ἄλλο, πάρος θάνατόν γε μεμορμένον ἀμφικαλύψαι → nor will anything else divide us from our love before the fate of death enshrouds us (Apollonius of Rhodes, Argonautica 3.1129f.)
English (Thayer)
(WH (βά), Hebrew אָב father, in the Chaldean emphatic state, אַבָּא i. e. ὁ πατήρ, a customary title of God in prayer. Whenever it occurs in the N. T. (אַבָּא, through frequent use in prayer, gradually acquired the nature of a most sacred proper name, to which the Greek-speaking Jews added the appellative from their own tongue.
Greek Monotonic
Ἀββᾶ: Εβρ. λέξη, πατέρας, σε Καινή Διαθήκη
Middle Liddell
English (Strong)
of Chaldee origin (אַב); father as a vocative: Abba.
Greek (Liddell-Scott)
ἀββᾶ: Ἑβρ. λέξις = πατήρ, Εὐαγ. Μάρκ. ιδ΄. 36.
Russian (Dvoretsky)
ἀββᾶ: ὁ (евр.) отец NT.