Verb (5-dan, る, intransitive)
1. to be lifted; to be raised; to rise; to go up
あまり重さを感じずに持ち上がって、驚いた。I was surprised that it lifted up without me feeling much weight.
2. to happen suddenly; to occur; to come up; to turn up
しかし、ここで疑問が持ち上がる。However, a question arises here.
3. to be homeroom teacher for the same class multiple years in a row; to move up with one's class
卒業っていっても、クラスの半分ぐらいは持ち上がりだし。We may be graduating, but about half the class is moving up together anyway.