夙敵

夙敌
sùdí
  1. old foe
  2. long-standing enemy

CEDICT

長久以來相對抗的敵人。如：「惰性是我們與生俱來最大的夙敵。」「眾所周知，這兩家公司向來是商場上相互較勁的夙敵。」

重編國語辭典

Entry Composition

1 夙 sù
  1. morning
  2. early
  3. long-held
  4. long-cherished
2 敵 dí
  1. (bound form) enemy
  2. (bound form) to be a match for; to rival
  3. (bound form) to resist; to withstand

Related entries

宿仇 sùchóu
  1. feud
  2. vendetta
  3. old foe