Lexicon :: Strong's G687 - ara

ἆρα, an interrogative particle ["implying anxiety or impatience on the part of the questioner." Liddell and Scott, under the word] (of the same root as the preceding ἄρα, and only differing from it in that more vocal stress is laid upon the first syllable, which is therefore circumflexed);
1. num igitur, i. e. marking an inferential question to which a negative answer is expected: Luke 18:8; with γε rendering it more pointed, ἆρά γε [G T ἆράγε]: Acts 8:30; [ἆρα οὖν... διώκομεν Lachmann edition min. also major marginal reading are we then pursuing etc. Romans 14:19].
2. ergone i. e. a question to which an affirmative answer is expected, in an interrogative apodosis (German so ist also wohl?), he is then? Galatians 2:17 (where others [e. g. Lachmann] write ἄρα, so that this example is referred to those mentioned under ἄρα, 3, and is rendered Christ is then a minister of sin; but μὴ γένοιτο, which follows, is everywhere by Paul opposed to a question). Cf. Winers Grammar, 510f (475f) [also Buttmann, 247 (213), 371 (318); Herm. ad Vig., p. 820ff; Klotz ad Devar. ii., p. 180ff; speaking somewhat loosely, it may be said "ἆρα expresses bewilderment as to a possible conclusion... ἆρα hesitates, while ἄρα concludes." Bp. Lightfoot on Galatians, the passage cited].

Related entry:

[ἆράγε, see ἆρα, 1.]