ἀντοφείλειν
From LSJ
ἤ με φίλει καθαρὸν θέμενος νόον, ἤ μ' ἀποειπών ἐχθαιρ' ἀμφαδίην νεῖκος ἀειράμενος → either love me with a pure heart, or reject and hate me, and openly pick a fight
Greek > English (Woodhouse Verbs Reversed)
(see also: ἀντοφείλω) owe in return
Lexicon Thucydideum
accepti beneficii gratiam debere, to owe thanks for a favor received, 2.40.4.