to reduce; to lower; to bring down

to belittle; to disparage; to play down; to demean; to degrade; to devalue

to lower (one's voice)

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

to lower; to be humble