διατεκμαίρομαι
From LSJ
ἄνω ποταμῶν ἱερῶν χωροῦσι παγαί → the springs of sacred rivers flow upward, backward to their sources flow the streams of holy rivers
English (LSJ)
only aor. 1 -τεκμηράμην,
A mark out, assign, ἔργα ἀνθρώποισι Hes.Op.398, cf. D.P.1172; mark, trace out, A.R.4.284; determine, γενέθλην Μοῖραι δ. Man.6.750.