ῥᾷον ὀμνύναι κἀπιορκεῖν ἢ ὁτιοῦν → they thought less of swearing and perjuring themselves than of anything else in the world
prōmissor: ōris, m. id.,
I a promiser, esp. who promises great things (very rare), Hor A. P 138; Quint. 1, 5, 6 Zumpt.
prōmissŏr,¹⁶ ōris, m. (promitto), prometteur : Hor. P. 138 ; Quint. 1, 5, 6.