The word "勾起" is formed by combining the character "勾", which means to hook, catch, or induce, with the character "起", which means to rise, start, or initiate. In this compound verb, "勾" represents the action of pulling or catching, while "起" signifies the resulting movement upward or emergence, together conveying the sense of evoking or recalling, such as bringing memories or emotions to the forefront.