relyyoudaoicibaDictYouDict[rely 词源字典]
rely: [14] Rely comes via Old French relier from Latin religāre ‘tie back, tie tightly’ (source also of English religion). It was a compound verb formed from the prefix re- ‘back’ and ligāre ‘tie’ (source of English ally, liable, ligament, etc). It was originally used for ‘assemble’, which by the 16th century had developed via ‘come together with one’s friends’ to ‘depend’. The derivative reliable is first recorded in 16th-century Scottish English, but did not enter general usage until the mid 19th century.
=> ally, liable, ligament, ligature, religion[rely etymology, rely origin, 英语词源]
rely (v.)youdaoicibaDictYouDict
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.