| Tools to study difficult words | Show Helper |
| Hard TOEFL Words - Group 13 | View Group Words |
effectiveness, efficiency, or validity | |
destruction; destroy; smash or break forcefully | |
as the alternative to or in contrast with; used to link two or more opposing or contrasting elements | |
difference in electrical charge between two points |
a place where something is generated; encompassing, protective hollow or space | |
amount produced; crop; income on investment; energy released by an explosion | |
animals having a bony or cartilaginous skeleton with a segmented spinal column | |
depot; storehouse for goods and merchandise |
authorization or certification; sanction, as given by a superior; an order that serves as authorization | |
act of vibrating; a shaky motion | |
difference in electrical charge between two points | |
craft, especially one larger than a rowboat, designed to navigate on water |
as the alternative to or in contrast with; used to link two or more opposing or contrasting elements | |
attentive to discover and avoid danger, or to provide for safety; wakeful | |
active; energetic; lively | |
a cassette for videotape |
active strength of body or mind; imaginative lively style, especially style of writing; exertion of force | |
act of vibrating; a shaky motion | |
animals having a bony or cartilaginous skeleton with a segmented spinal column | |
benefit; something that aids health or happiness |
as the alternative to or in contrast with; used to link two or more opposing or contrasting elements | |
destruction; destroy; smash or break forcefully | |
conqueror; winner | |
very clever and humorous |
take note of; observe; attest to the legality of by signing one's name to | |
a cassette for videotape | |
animals having a bony or cartilaginous skeleton with a segmented spinal column | |
a citizen who has a legal right to vote |
almost completely; practically; essentially | |
effectiveness, efficiency, or validity | |
attentive to discover and avoid danger, or to provide for safety; wakeful | |
career; profession |
any of many types of stinging flying insect | |
a minor difficulty; a slight depression in the smoothness of a surface | |
being often in public eye; obvious to the eye | |
difference in electrical charge between two points |
authorization or certification; sanction, as given by a superior; an order that serves as authorization | |
ability to see; sight; vivid mental image | |
dense, soft, often curly hair forming the coat of sheep and certain other mammals | |
conqueror; winner |