2、order:  Order comes via Old French ordre from Latin ōrdō. This originally denoted a ‘row, line, series, or other regular arrangement’, but it spawned a lot of other metaphorical meanings that have also come through into English, including ‘regularity’ and (from the general notion of a ‘rank’ or ‘class’) ‘ecclesiastical rank or office’ (preserved in English in ‘holy orders’ and in the derivatives ordain  and ordination ).The sense ‘command, directive’, first recorded in English in the mid-16th century, presumably comes from the notion of ‘keeping in order’. Other derivatives of ōrdō are represented by ordinance  and ordinary.=> ordain, ordinary, ordination
4、early 13c.,"body of persons living under a religious discipline,"from Old French ordre"position, estate; rule, regulation; religious order"(11c.), from earlier ordene, from Latin ordinem (nominative ordo)"row, rank, series, arrangement,"originally"a row of threads in a loom,"from Italic root *ord-"to arrange, arrangement"(source of ordiri"to begin to weave;"compare primordial), of unknown origin. Meaning"a rank in the (secular) community"is first recorded c. 1300; meaning"command, directive"is first recorded 1540s, from the notion of"to keep in order."Military and honorary orders grew our of the fraternities of Crusader knights. Business and commerce sense is attested from 1837. In natural history, as a classification of living things, it is first recorded 1760. Meaning"condition of a community which is under the rule of law"is from late 15c. Phrase in order to (1650s) preserves etymological notion of"sequence."The word reflects a medieval notion:"a system of parts subject to certain uniform, established ranks or proportions,"and was used of everything from architecture to angels. Old English expressed many of the same ideas with endebyrdnes. In short order"without delay"is from 1834, American English; order of battle is from 1769.
6、c. 1200,"give order to, to arrange in order,"from order (n.). Meaning"to give orders for or to"is from 1540s. Related: Ordered; ordering.