1. tooth
2. ivory

classifier: 顆

1. to buy
2. to purchase

1. to add
2. (math.) plus
3. to increase; to augment
4. (used before a disyllabic verb, often after an adverb like 不 bù, 大 dà, 稍 shāo etc, to indicate that the action applies to sth previously mentioned, as in 稍加改良 shāojiāgǎiliáng "make some minor improvements to (it)")