だれにとっても最大の敵は自分自身だの英語

Security is the greatest enemy.

The enemy rely on numbers―trust to numbers.

There is no fighting against such odds.

We must fight a vast army―a mighty host.

We have no common enemy to deal with.

He will make an implacable enemy.

We are outnumbered

The enemy relied on numbers―trusted to numbers.

stood resolute against the enemy

The enemy holds a strong position.

We should be playing the enemy's game―playing into the enemy's hands.

the nearest rival

The enemy holds a strong position.

The enemy are superior in numbers―superior in numerical strength―The enemy outnumber us.

Who is your enemy?

a person who has an enemy

Do not behave unseemly―show the white feather―in presence of the enemy!

the condition of easily beating an enemy

to fight desperately against someone

Your conduct towards your enemy does you honour

My enemy's enemy is my friend.

the condition of having a person think of one as his or her enemy

There is no fighting against such odds.

to be an enemy of many people

We are determined to fight till the enemy comes to his knees―（他動詞構文にすれば）―We are determined to bring the enemy to his knees.

Do not give your enemy a handle against you―give your enemy a handle for your censure.

one's worst enemy

the act of inflicting pain on oneself in order to deceive an enemy

His conduct towards his enemy is above praise.

to make profit for one's opponent