高低

gāo dīgaodi

1. height; level; (music) pitch
2. relative superiority
3. propriety; discretion (usu. in the negative, e.g. 不知高低[bu4 zhi1 gao1 di1])
4. no matter what; just; simply (will not ..., must ... etc)
5. at long last

Study it in Yanamino