ὑφάπτω · hyphaptō — LSJ
set on fire from underneath
set on fire from underneath, ὑπῆψαν τὴν ἀκρόπολιν Hdt. 1.176; ὑφῆψε δῶμʼ ἀνηφαίστῳ πυρί E. Or. 621, cf. 1618; ὑ. πυράν Th. 2.52:—Pass., πόλις ὑφάπτεται πυρί E. Tr. 1274; ἃς (sc. ἁμάξας) ἔδει ἐν καιρῷ ὑφαφθῆναι Aen.Tact. 28.7; εὕρωμεν (i. e. -ομεν) τὰς θύρας . . ὑφημ<μ>ένας φωτί BGU 1201.10 (i A. D.).
2 inflame unperceived
metaph., inflame unperceived, τοὺς θεωμένους X. Cyr. 5.1.16.
II light underneath, shall light, light a fire under, in
light underneath, πῦρ, φλόγα, Luc. Phal. 1.12, Aristaenet. 2.4; ὁ νικέων ὑφαπτέτω τὰ ἱερά the winner (in the race) shall light the sacred lamps, SIG 71.16 (Delph., ii B. C.): abs., light a fire under or in a place, Ar. Th. 730.
B tie, bind under, tying a rope round
Med., tie or bind under, ὑπὸ δειρὴν ἁψαμένη tying a rope round her neck, hanging herself, Alex.Aet. 3.33.