πάλσις
From LSJ
ἀνάγκᾳ δ' οὐδὲ θεοὶ μάχονται → but not even gods fight necessity (Simonides, fr. 37.1.29)
English (LSJ)
εως, ἡ,
A rapid motion, vibration, ἀκτίνων Porph. ap. Eus.PE 3.11; in Epicur., = παλμός, internal vibration, Ep.1p.12U. 2 brandishing, δοράτων EM394.56; palpitation, τῆς καρδίας Chrysipp.Stoic.2.247.