Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* sāgĭo, īre, v. n. [root sagh-, to be sharp; Sanscr. saghnomi, kill; Gr. σάγαρις, battle-axe; cf.: sagus, sagax, sagitta], 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.