加

jiā ㄐㄧㄚ

1. to add
2. plus

   math.

3. to increase to augment
4. (used before a disyllabic verb, often after an adverb like 不[bu4], 大[da4], 稍[shao1] etc, to indicate that the action applies to sth previously mentioned, as in 稍加改良[shao1 jia1 gai3 liang2] "make some minor improvements to (it)")