a: what type of tree is that?
b: i think it is a maple
maple n. 槭树，枫树，槭木
a: i really dislike stephanie.
b: don’t try to mar me with your negative impressions of her before i even meet her.
mar vt. 破坏，毁坏
a: i’m getting a new fireplace installed.
b: is it the marble one you had your eye on?
marble n. 1. 大理石;2. (用玻璃、石头等制成的)弹子;3. [pl.]弹子游戏
a: the mare is expecting her foal in three weeks.
b: oh! i thought a mare was a male horse, silly me!
mare n. 母马，母驴
a: did you do well in the exam, sir?
b: yes, you only made some marginal errors.
marginal a. 1. 微小的，少量的，不重要的;2. 仅以微弱多数票获胜的;3. 记(或引)在页边的，有旁注的
a: have you ever smoked marijuana?
b: no, i have never tried drugs.
marijuana n. 大麻，大麻烟
a: what is your marital status?
b: i am married.
marital a. 婚姻的，夫妻的
a: i’m going to visit the maritime museum this afternoon.
b: i assume that it is the one by the sea.
maritime a. 1. 海的，海事的，航海的;2. 近海的，海的
a: it rained so much. my garden is like a marsh.
b: don’t worry, it will dry out soon.
marsh n. 沼泽，湿地
a: i was a marshal in the army for 11 years.
b: gosh, that is a high rank, you must have worked hard to get there.
marshal n. 1. 元帅，最高指挥官;2. (某些群众活动的)总指挥，司仪;3. (美国的)执法官，警察局长，消防队长
vt. 整理，排列，集结
a: i read that the ancient romans were martial people.
b: i’m not sure if they were inclined to war.
martial a. 战争的，军事的，武术的
a: the sunset is amazing.
b: yes, i am sitting here marveling at it right now.
marvel vi. (at) 惊叹，赞佩
vt. 对……感到惊异
n. 令人惊异(或不可思议)的事，奇迹
a: that girl looks particularly masculine.
b: maybe it is because she lifts weights.
masculine a. 1. 男性的，男子的;2. 男子气的
a: shall i mash your potatoes?
b: no, thanks, i like them whole.
mash vt. (up) 把……捣成糊状
n. 糊状物
a: the soldiers massacred each other with gunfire during the war.
b: do you know how many people were killed?
massacre vt. 1. 大规模屠杀，残杀;2. 彻底击败
n. 1. 大屠杀，残杀;2. (比赛等)残败