ἴσαμι
From LSJ
ὁ χρόνος ἐστὶ δάνος, τὸ ζῆν πικρός ἐσθ' ὁ δανίσας → time is a loan, and he who lent you life is a hard creditor | time is on loan and life's lender is a prick
English (LSJ)
A v. Εἴδω (B), and add: ἴσᾱμι Theoc.5.119; ἴσαις (2sg.) Id.14.34; ἴσᾱτι Id.15.146; ἴσᾰτε Periand. ap. D.L.1.99; ἴσαντι Theoc. 15.64; inf. γισάμεναι (i.e. ϝισ-) · εἰδέναι, Hsch.; Arc. ἰσάμεν (ισμεν lapis), IG5(2).357.12; 3pl. subj. ἴσαντι Schwyzer 190 (Cretan).