appearance ap•pear•ance3 ə SvUƍ əQV n. D IDOVH VKRZ The outraged customer put on a


calm appearance. ap•pro•pri•ate1


ap•pro•pri•ate2 ə SUǀƍ SUƝ ƱW adj. VXLWDEOH RU SURSHU Heavy clothing will be


appropriate for the northern trip. —ap•pro•pri•ate•ly adv. —ap•pro•pri•ate•ness n.


ə SUǀƍ SUƝ ƗWƍ v. ap•pro•pri•at•ed, ap•pro•pri•at•ing,


ap•pro•pri•ates. WR VHW DSDUW RU WDNH The school district appropriated money for new books. —ap•pro•pri•a•tive adj. —ap•pro•pri•a•tor n.


ap•prox•i•mate1 ə SUǂNƍ Və PƱW adj. DOPRVW H[DFW The approximate time of our


arrival was noon. —ap•prox•i•mate•ly adv. ap•prox•i•mate2


ə SUǂNƍ Və PƗWƍ v. ap•prox•i•mat•ed, ap•prox•i•mat•ing,


ap•prox•i•mates. WR FRPH FORVH WR EH QHDUO\ WKH VDPH DV The seating in the theater approximates two hundred. —ap•prox•i•mate•ly adv.


aq•ua•ma•rine1 ăNƍwəPə UƝQƍ or lƍkwəPə rƝQƍ/ n. D SDOH EOXH JUHHQ FRORU The


water in the pool is aquamarine. aq•ua•ma•rine2


ăNƍwəPə UƝQƍ or lƍkwəPə rƝQƍ/ n. D SDOH EOXH JUHHQ JHPVWRQH Aquamarine is the March birthstone.


a•quar•i•um ə NZkUƍ Ɲ əP n., pl. a•quar•i•ums or a•quar•i•a /ə NZkUƍ Ɲ ə/ D FRQWDLQHU RI ZDWHU IRU ILVK DQLPDOV RU SODQWV Our classroom aquarium is filled with goldfish.


a•quat•ic ə NZăWƍ ƱN or ə NZǂWƍ ƱN adj. UHODWLQJ WR ZDWHU Aquatic plants are food for many fish.


aq•ue•duct /ăNƍ ZƱ GǎNWƍ n. D SLSH IRU FDUU\LQJ ZDWHU The Romans built aqueducts to their cities.


ar•chae•ol•o•gist or ar•che•ol•o•gist lUƍ NƝ ǂOƍ ə MƱVW n. D SHUVRQ ZKR VWXGLHV UHPDLQV RI REMHFWV IURP WKH SDVW VXFK DV WRROV DQG SRWWHU\ My brother wants to be an archaeologist.


a•shamed ə VKƗPGƍ/ adj. IHHOLQJ VKDPH I felt ashamed for lying. —a•sham•ed•ly ə VKƗƍ PƱG OƝ adv.


as•so•ci•a•tion ə Vǀƍ VƝ Ɨƍ VKəQ or ə Vǀƍ VKƝ Ɨƍ VKəQ n. D JURXS RI SHRSOH ZLWK WKH


VDPH LQWHUHVWV The parent association will meet to plan the school picnic. —as•so•ci•a•tion•al adj.


Assume and astonish are vocabulary words featured in Unit 8.


as•sume ə s ØRRPƍ/ v. as•sumed, as•sum•ing, as•sumes. WR VXSSRVH I


assume the plane will leave on time. —as•sum•a•ble adj. —as•sum•a•bly adv. —as•sum•er n.


as•ter•oid /ăVƍ Wə URLGƍ/ n. D ODUJH FKXQN RI URFN RUELWLQJ WKH VXQ We looked through a telescope to see the asteroid.


a•ston•ish ə stǂQƍ ƱVK v. a•ston•ished, a•ston•ish•ing, a•ston•ish•es. WR VXUSULVH RU DPD]H I was astonished to win the contest. —a•ston•ish•ing•ly adv.


as•tro•naut /ăVƍ WUə Q{Wƍ n. D SHUVRQ ZKR LV WUDLQHG WR VHUYH RQ D VSDFHFUDIW An astronaut wears special clothes in space.


as•tron•o•my ə VWUǂQƍ ə PƝ n., pl. as•tron•o•mies. WKH VWXG\ RI VWDUV DQG SODQHWV In my book about astronomy, I read about the Milky Way.


at•mos•phere /ăWƍ Pə VIvUƍ n WKH JDVHV DQG DLU WKDW VXUURXQG RXU SODQHW RU RWKHU KHDYHQO\ ERGLHV Earth’s atmosphere affects the weather. B


bac•te•ri•a EăN tîrƍ Ɲ ə n., pl. of bac•te•ri•um EăN WvUƍ Ɲ əP WLQ\ RQH FHOOHG RUJDQLVPV VRPH RI ZKLFK FDQ FDXVH GLVHDVH The harmful bacteria caused the child to become quite ill.


bar•ri•er /EăUƍ Ɲ əU n. VRPHWKLQJ WKDW EORFNV VRPHWKLQJ HOVH A barrier was placed at the entrance of the street.


bil•low /EƱOƍ ǀ v. bil•lowed, bil•low•ing, bil•lows. WR VXUJH WR ZDYH The curtains billowed in the wind.²bil•low•y adj.²bil•low•i•ness n.


bolt1 bolt2 bolt3 bolt4


EǀOW n. D WKUHDGHG SLQ RU URG XVHG WR KROG WKLQJV WRJHWKHU We used bolts to put the boards together.


EǀOW n. D URG D VOLGLQJ EDU XVHG IRU IDVWHQLQJ Latch the bolt on the gate as you leave.


EǀOW v. bolt•ed, bolt•ing, bolts. WR IDVWHQ ZLWK D EROW She bolted the baby VZLQJ WR WKH IORRU VR LW ZRXOGQƍW WLS RYHU


EǀOW v. bolt•ed, bolt•ing, bolts. WR PRYH VXGGHQO\ WR UXQ DZD\ The horse bolted when the gate was opened.


DICTIONARY 25


bolt


A B


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