sāgĭo — Lewis & Short
sāgĭo, īre, v. n.root sagh-, to be sharp; Sanscr. saghnomi, kill; Gr. sa/garis, battle-axe; cf.: sagus, sagax, sagitta,
I to perceive quickly or keenly by the senses; trop., to perceive acutely with the intellect: sagire sentire acute est: ex quo sagae anus, quia multa scire volunt;
et sagaces dicti canes. Is igitur, qui ante sagit quam oblata res est, dicitur praesagire, id est futura ante sentire,Cic. Div. 1, 31, 65.