To make an effort to vomit; to strain, as in vomiting.

an involuntary spasm of ineffectual vomiting; "a bad case of the heaves"

eject the contents of the stomach through the mouth; "After drinking too much, the students vomited"; "He purged continuously"; "The patient regurgitated the food we gave him last night"

To grasp for. "The right feilder retch over into the stands and caught the ball."

To care for; to heed; to reck.