Verb
(transitive) To persist in.
Learning a new language is hard, but if you keep at it, you'll get better.
(transitive) To constrain (a person) to continue doing (a task).
If he doesn't get back to you right away, just keep at him and eventually you'll get an answer.
That's all I can do. I'll keep at it and hope it gets better. Ned Vizzini
Sweet pea?'" Alec said. "I was just trying it out." Alec shook his head. "No." Magnus shrugged. "I'll keep at it. Cassandra Clare
Also, stick around. Don't lose your heart, just keep going, keep at it. Mark Ruffalo
By learning about my body and making small, subtle changes, I find out what I enjoy and what is effective. I'm always finessing: adjusting my diet and my workouts. You have to figure out which exercises are fun and interesting and stimulate your brain - or else you'll never keep at them. Lisa Edelstein
I would like to instill in people just to work hard. As long as they keep at it, their dreams will happen. Misty May-Treanor
People will tell you that you can't do it, no matter what you are trying to do, so you just have to really keep at it. Madisen Beaty