formyoudaoicibaDictYouDict[form 词源字典]
form: [13] Form comes via Old French forme from Latin forma ‘shape, contour’, a word whose origins have never been satisfactorily explained. Its semantic similarity to Greek morphé ‘form, shape’ (source of English morphology [19]) is striking, and has led some etymologists to suggest that the Latin word may be an alteration of the Greek one, presumably by metathesis (the reversal of sounds, in this case /m/ and /f/).

Another possibility, however, is that it comes from ferīre ‘strike’, from the notion of an impression, image, or shape being created by beating. Of the word’s wide diversity of modern senses, ‘school class’, a 16th-century introduction, was inspired by the late Latin usage forma prima, forma secunda, etc for different orders of clergy, while ‘bench’ may go back to the Old French expression s’asseoir en forme ‘sit in a row’.

Amongst forma’s derivatives that have found their way into English are formal [14], format [19], formula [17] (from a Latin diminutive form), and uniform.

=> formal, format, formula, inform, uniform[form etymology, form origin, 英语词源]
form (n.)youdaoicibaDictYouDict
c. 1200, forme, fourme, "semblance, image, likeness," from Old French forme, fourme, "physical form, appearance; pleasing looks; shape, image; way, manner" (12c.), from Latin forma "form, contour, figure, shape; appearance, looks; a fine form, beauty; an outline, a model, pattern, design; sort, kind condition," a word of unknown origin. One theory holds that it is from or cognate with Greek morphe "form, beauty, outward appearance" (see Morpheus) via Etruscan [Klein].

From c. 1300 as "physical shape (of something), contour, outline," of a person, "shape of the body;" also "appearance, likeness;" also "the imprint of an object." From c. 1300 as "correct or appropriate way of doing something; established procedure; traditional usage; formal etiquette." Mid-14c. as "instrument for shaping; a mould;" late 14c. as "way in which something is done," also "pattern of a manufactured object." Used widely from late 14c. in theology and Platonic philosophy with senses "archetype of a thing or class; Platonic essence of a thing; the formative principle." From c. 1300 in law, "a legal agreement; terms of agreement," later "a legal document" (mid-14c.). Meaning "a document with blanks to be filled in" is from 1855. From 1590s as "systematic or orderly arrangement;" from 1610s as "mere ceremony." From 1550s as "a class or rank at school" (from sense "a fixed course of study," late 14c.). Form-fitting (adj.) in reference to clothing is from 1893.
form (v.)youdaoicibaDictYouDict
c. 1300, formen, fourmen, "create, give life to, give shape or structure to; make, build, construct, devise," from Old French fourmer "formulate, express; draft, create, shape, mold" (12c.) and directly from Latin formare "to shape, fashion, build," also figurative, from forma "form, contour, figure, shape" (see form (n.)). From late 14c. as "go to make up, be a constituent part of;" intransitive sense "take form, come into form" is from 1722. Related: Formed; forming.