She didn't pay him any attention and walked straight out.
Tips
usage
睬 is almost exclusively used in negative constructions: 不睬, 不理睬, 不理不睬. You will rarely see 睬 used affirmatively. It means to acknowledge someone's presence or words.
Left eye radical, the indexing element - originally a horizontal pictograph of an eye and pupil, rotated upright so the dashes inside became the iris. Marks 睬 as a seeing/noticing verb: to acknowledge someone with a glance. Same family as 看 look, 眼 eye, 睛 eyeball, 瞧 to glance.
Right 采 supplies the sound directly: cǎi → cǎi. Faint semantic flavour too - 采 means 'a hand picking from a tree,' and 睬 picks someone out with the eye for a glance. Almost always negated: 不睬 ignore, 不理不睬 give the cold shoulder.
