[39] Σμινθεῦ: “Σμινθεύς” is a short, familiar form (§ 21 e) for “Σμινθοφθόρος”, epith. of Apollo as the averter of the plague of field mice.
εἴ ποτε: if ever, a form of adjuration.
χαρίεντα: proleptic, to thy pleasure, lit. as a pleasing one.
ἐπὶ ἔρεψα: roofed over, i.e. completed, built. The suppliant believes that he has made the god his debtor by his services, and he claims favors in return; cf. vs. 503 f., 8.238 ff., “Ο 372, δ” 763. The gods themselves recognized this obligation, “Χ 170, Ω” 68; in Od. 1.60 f. Athena reproaches Zeus for his neglect of Odysseus in spite of the latter's burnt offerings.
νηόν: Homer follows the so-called Attic second declension in but a few words, § 17 f.