2、matter:  Matter comes via Anglo-Norman matere from Latin māteria ‘matter’. This was originally applied to the ‘hard inner wood of a tree’, and etymologically denoted the ‘matrix’ or ‘mother’ from which the tree’s new growth came (it was a derivative of Latin māter ‘mother’). The verbal use of matter dates from the late 16th century. Material originated as a derivative of Latin māteria.=> material, mother
4、c. 1200, materie,"subject of thought, speech, or expression,"from Anglo-French matere, Old French matere"subject, theme, topic; substance, content, material; character, education"(12c., Modern French matière), from Latin materia"substance from which something is made,"also"hard inner wood of a tree"(source also of Portuguese madeira"wood"), from mater"origin, source, mother"(see mother (n.1)). Or, on another theory, it represents *dmateria, from PIE root *dem-/*dom- (source of Latin domus"house,"English timber). With sense development in Latin influenced by Greek hyle, of which it was the equivalent in philosophy. Meaning"physical substance generally, matter, material"is early 14c.; that of"substance of which some specific object is made or consists of"is attested from late 14c. That of"piece of business, affair, activity, situation, circumstance"is from late 14c. From mid-14c. as"subject of a literary work, content of what is written, main theme."Also in Middle English as"cause, reasons, ground; essential character; field of investigation." Matter of course"something expected"attested from 1739. For that matter attested from 1670s. What is the matter"what concerns (someone), the cause of the difficulty"is attested from mid-15c. To make no matter"be no difference to"also is mid-15c.
6、"to be of importance or consequence,"1580s, from matter (n.). Related: Mattered; mattering.