练

liàn - exercise, practise

I came across this word today as the title of a Flickr picture and it looked familiar. I'd learnt it on iKnow but couldn't remember what it meant (although I did remember its reading somehow). It seems like a good word to learn as I'm supposed to be practising.

只有常练, 才能学好汉语。
Only by practising constantly can we learn Chinese well.