compression

compression
noun

[mass noun]the action of compressing or being compressed
压缩；压紧；压挤
■the reduction in volume (causing an increase in pressure) of the fuel mixture in an internal-combustion engine before ignition
（点火前内燃机中混合燃料体积的）压缩

派生
compressional
adjective
语源

late Middle English: via Old French from Latin compressio(n-), from comprimere 'press together' (see compress)