συναναπληρόω
From LSJ
εἰ δὲ τύχῃ τις ἔρδων, μελίφρον' αἰτίαν ῥοαῖσι Μοισᾶν ἐνέβαλε → if someone is successful in his deeds, he casts a cause for sweet thoughts into the streams of the Muses
English (LSJ)
A fill up at the same time, Thphr.HP4.13.4 (Pass.); τὰς μεταξύτητας Nicom.Harm.6; make up or compensate, τινί τι Plb.22.20.7; μετ' εὐφημίας τὸ ἐλλεῖπον Plu.2.795b.