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jump [jump 词源字典]: jump: [16] Until the early modern English period, the words for ‘jump’ were leap and spring. Then, apparently out of nowhere, the verb jump appeared. Its provenance has never been satisfactorily explained, and etymologists fall back on the notion that it may originally have been intended to suggest the sound of jumping feet hitting the ground (the similar-sounding bump and thump are used to support this theory).

And certainly one of the earliest known instances of the word’s use connotes as much ‘making heavy contact’ as ‘rising’: ‘The said anchor held us from jumping and beating upon the said rock’, Sir Richard Guylforde, Pilgrimage to the Holy Land 1511. Jumper ‘sweater’ [19], incidentally, appears to have no etymological connection with jump. It was probably derived from an earlier dialectal jump or jup, which denoted a short coat for men or a sort of woman’s underbodice.

This in turn was borrowed from French juppe, a variant of jupe ‘skirt’, whose ultimate source was Arabic jubbah, the name of a sort of loose outer garment.
[jump etymology, jump origin, 英语词源]
recidivist: recidivist: [19] A recidivist – a ‘persistent offender’ – is etymologically someone who ‘falls back’. The word was borrowed from French récidiviste, a descendant of medieval Latin recidīvāre. This in turn was based on the noun recidīvus ‘falling back’, a derivative of Latin recidere ‘fall back’, which was a compound verb formed from the prefix re- ‘back, again’ and cadere ‘fall’ (source of English cadence, case, decadent, etc).
=> cadaver, cadence, case, decadent
recede (v.): early 15c., from Middle French receder, from Latin recedere "to go back, fall back; withdraw, depart, retire," from re- "back" (see re-) + cedere "to go" (see cede). Related: Receded; receding.
recidivate (v.): "fall back; relapse," 1520s, from Medieval Latin recidivatus, past participle of recidivare "to relapse" (see recidivist). Related: Recidivated; recidivating.
recidivist (n.): "relapsed criminal," 1863, from French récidiviste, from récidiver "to fall back, relapse," from Medieval Latin recidivare "to relapse into sin," from Latin recidivus "falling back," from recidere "fall back," from re- "back, again" (see re-) + comb. form of cadere "to fall" (see case (n.)). Recidivation in the spiritual sense is attested from early 15c., was very common 17c.
rely (v.): early 14c., "to gather, assemble" (transitive and intransitive), from Old French relier "assemble, put together; fasten, attach, rally, oblige," from Latin religare "fasten, bind fast," from re-, intensive prefix (see re-), + ligare "to bind" (see ligament). Sense of "depend, trust" is from 1570s, perhaps via notion of "rally to, fall back on." Typically used with on, perhaps by influence of lie (v.2). Related: Relied; relying.
retreat (v.): early 15c., "to draw in, draw back, leave the extremities," from retreat (n.) and in part from Old French retret, past participle of retrere. Meaning "to fall back from battle" is mid-15c. Related: Retreated; retreating.