internecine

• 2人が敗れ、殺し合う。

inter-、内部で、その中で、互いに、-nec、迷惑、害、語源的にはnoxious、迷惑と同じ。

internecine

internecine: [17] Etymologically, internecine denotes ‘attended by great slaughter’. Its modern connotations of ‘conflict within a group’, which can be traced back to the 18th century (Dr Johnson in his Dictionary 1755 defines it as ‘endeavouring mutual destruction’), presumably arise from the standard interpretation of inter- as ‘among, between’. But in fact in the case of internecine it was originally used simply as an intensive prefix.

The word was borrowed from Latin internecīnus, a derivative of internecāre ‘slaughter, exterminate’. This was a compound verb formed with the intensive inter- from necāre ‘kill’ (a relative of English necromancy and pernicious).
=> necromancy, pernicious

internecine (adj.)

1660s, "deadly, destructive," from Latin internecinus "very deadly, murderous, destructive," from internecare "kill or destroy," from inter (see inter-) + necare "kill" (see noxious). Considered in the OED as misinterpreted in Johnson's Dictionary [1755], which defined it as "endeavouring mutual destruction," on association of inter- with "mutual" when the prefix supposedly is used in this case as an intensive. From Johnson, wrongly or not, has come the main modern definition of "mutually destructive."

1. The whole episode has drawn attention again to internecine strife in the ruling party.

事件全体が再び与党内の紛争に関心を集めている。

2.The internecine strife was caused by a shortage of food.

今回の内部衝突は、食料不足によるものだった。

3.Strife was internecine during the next fortnight.

今後2週間の衝突で私たちは共倒れになった。

4.Marx foresaw constant internecine warfare among capitalists，resulting in and fewer controlling vaster and vaster empires.

マルクスは資本家が絶えず自滅することを予見し、結果としてますます多くの人がますます大きな帝国を制御していることになる。

5.The strike with acerb contradictory conflict，massive capital，shut out，make both sides of capital internecine .

鋭い労使対立、大規模なストライキ、工場閉鎖により、労使双方が共倒れになった。