All languages use idioms for communication. My favorite idioms in English include:
Bite the dust.
A drop in the bucket.
The root of the matter.
Killing time.
Kick the bucket.
Throw in the towel.
Eat your heart out.
German too has some classic idioms:
You can put your poison on it (= You can bet your life on it).
Hit two flies with one swat (= Kill two birds with one stone).
Demand an extra sausage (= Demand special treatment).
I only understand train station (= It's all Greek to me!).
Have a pig (= Be lucky).
If you ever move to Hawaii, prepare to be met with a number of words and phrases that won't make any sense to you at first:
Talk story (= Catch up with friends).
Slippahs (= Flip flops).
Shishi (= Go pee).
Grinds (= Food).
Pupus (= Appetizers).
When you study Greek, learning Greek idioms is a fun and effective way to boost your language fluency. While some Greek idioms sound similar to their English equivalents, others are entirely different. My favorite Greek idioms are:
Speak mouth to mouth (= Speak face to face.)
Have in the womb (= Be pregnant).
Their eyes were weighed down (= They became very sleepy).
What to you and me? (= That's your business, not mine).
Eat your own bread (= Work for a living).
Kick against the goads (= Hurt oneself by active resistance).
Have it badly (= Be sick).
By the way, some of these idioms occur so often in the Septuagint that they might be considered Septuagintalisms.
Just thought I'd share that you!