apt: (tending)

Many people think that woman is more apt to be emotional than man because of the female hormone.

aqueous: (relate to water)

Mouth rinse is an anti bacteria aqueous solution fro teeth protection and breath freshness.

aquifer: (underground water supply)

They live in a rural area far from the city water system. The only way for them to gain access to water is by drilling deep wells into the aquifer which is 300 feet below ground.

arable: (capable of being farmed)

The Middle Eastern countries have a lot of desserts and arid regions, not suitable for farming. The lack of arable land means that they must import much of their food from the outside. Fortunately, they have oil for the trade.

arbiter: (someone chosen to judge)

The players and owners cannot come to an agreement on a contract. So they hire a neutral party as the arbiter who will propose a settlement that both parties can accept.

arbitrage: (trade when there is a difference in the prices)

They make money from the arbitrage between Chinese currency and US Dollars.