ἄθρει: like σκοπεῖν and similar verbs has the construction of verbs of fear.
αἰνιχθέντα: denotes the consequences previously intimated, though not definitely stated, by Socrates.
ὡς σύ γε οἴει: evasive, as 473 b. The following question inquires whether Callicles still holds to his previous statement, while accepting the consequences of it.