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express [express 词源字典]: express: [14] Something that is expressed is literally ‘pressed out’. The word comes via Old French from Vulgar Latin *expressāre, a compound verb formed from the prefix ex- ‘out’ and pressāre ‘press’. Its meaning developed metaphorically from ‘press out’ to ‘form by pressure’ (presumably applied originally to modelling in clay or some similar substance, and subsequently to sculpture and then painting), and finally to ‘make known in words’.

The Vulgar Latin verb was in fact moving in on territory already occupied by its classical Latin forerunner exprimere (source of French exprimer ‘express’ and perhaps of English sprain [17]). The past participle of this was expressus, used adjectivally for ‘prominent, distinct, explicit’. Old French took it over as expres and passed it on to English in the 14th century.

By now its meaning was moving towards ‘intended for a particular purpose’, and in the 19th century it was applied to ‘special’ trains (as in ‘football specials’). It did not take long, however, for this to slip via ‘train for people wanting to go to a particular place, and therefore not stopping anywhere else’ to ‘fast train’. Hence the modern sense of express, ‘fast’, was born.
=> espresso, press, sprain[express etymology, express origin, 英语词源]
cyclic (adj.): 1794, from French cyclique (16c.), from Latin cyclicus, from Greek kyklikos "moving in a circle," from kyklos (see cycle (n.)).
cyclone (n.): 1848, coined by British East India Company official Henry Piddington to describe the devastating storm of December 1789 in Coringa, India; irregularly formed from Greek kyklon "moving in a circle, whirling around," present participle of kykloun "move in a circle, whirl," from kyklos "circle" (see cycle (n.)). Applied to tornados from 1856.
aeromechanics: "The branch of mechanics concerned with the motion of air and other gases and of objects moving in them; the fluid mechanics of gases", Early 20th cent..