Terms for subject Idiomatic containing Enemy

English	Russian
ancestral enemy	давний враг, извечный враг, исконный враг, исторический враг (Yuri Ginsburg)
blood enemy	кровный враг (Novoross)
enemy's country	вражеский стан (Abysslooker)
I wouldn't wish on my worst enemy	врагу не пожелаешь (markovka)
I wouldn't wish that on my worst enemy	я бы и врагу такого не пожелал (McGraw-Hill's Dictionary of American Idioms and Phrasal Verbs)
know thy enemy	знай, кто твой враг (blackstar3103)
know your enemy	знай, кто твой враг (wikipedia.org blackstar3103)
perfect is the enemy of good	лучшее – враг хорошего (an aphorism which is commonly attributed to Voltaire, who quoted an Italian proverb in his Dictionnaire philosophique in 1770 Alex_Odeychuk)
play into the hands of the enemy	играть на руку врагу (Merriam-Webster ART Vancouver)
sleep with the enemy	'брататься' / якшаться с врагом
the best is the enemy of the good enough	лучшее – враг хорошего (an aphorism which is commonly attributed to Voltaire, who quoted an Italian proverb in his Dictionnaire philosophique in 1770)
you wouldn't wish something on your worst enemy	врагу не пожелаешь (markovka)