Keep/hold sth at bay

[Tdol]

Reading widely will also give you exposure to different contexts, which will help you to develop a sense of the appropriacy of vocab.

[wuwei]

Hi, Tdol,
Thanks for your suggestion, but I can not understand the meaning of 'a sense of the appropriacy', and I also consulted my oxford dictionary and did not get the result, so i think maybe it is typo, but I do not know the exact word is.
Thanks