mid-13c., egtetenþe, modified, by influence of eighteen, from Old English eahtateoða; from eight + teoða "tenth" (see -ty (1)). Cognate with German achtzehnte, Danish attende, Swedish adertonde.
权威例句
1. The eighteenth-century Admiralty had few coercive powers over its officers.
18世纪的英国海军部对其军官没有什么强制力。
2. Their lives interconnect with those of celebrated figures of the late eighteenth-century.
他们的生活与18世纪晚期的名人联系在一起。
3. Such disputes multiplied in the eighteenth and nineteenth centuries.