keep at (something)

to continue to do something.

It wasn't easy to learn to skate, but I kept at it, and finally I could skate decently enough.

• think nothing of doing something
• think nothing of something
• think on feet
• think on your feet
• think out loud
• think outside the box
• think over
• think positive
• think something over
• think something through
• think straight
• think-tank
• think the sun shines out arse
• think the sun shines out backside
• think the sun shines out of arse
• think the sun shines out of backside
• think the sun shines out of someone's arse
• think the sun shines out of someone's backside
• think the sun shines out someone's arse
• think the sun shines out someone's backside
• think the world of
• think the world of someone
• think through
• think to
• think to yourself