Idioms and verbal phrases are expressions peculiar to a particular language, here are some examples.
Abreast of : (side by side)
Ex : We should not ride on scooters abreast of one another.
Addle-headed : (foolish)
Ex : Ramu is an addle-headed boy because at the slightest provocation, he goes on doing silly things.
Allegiance to : (loyalty to)
Ex : I owe allegiance to none.
Allude to : (refer indirectly to)
Shakespeare alludes to a number of Greek mythological stories.
Amenable to : (tractable)
Ex : Children are amenable to reason.
Animosity : (hostility)
Ex : I have no animosity against anyone.
Anodyne to : (remedy to assuage pain)
Ex : There is no anodyne to mental worry.
Arrogate to : (claim unduly)
Ex : He arrogated to himself what actually belonged to others.
At daggers drawn : (in great hostility)
Ex : John and Akbar who were once close friends are now at daggers drawn.
Atone for : (make amends for)
Ex : We should atone for our misdeeds.
At sixes and sevens : (in utter confusion)
Ex : When the youth festival celebrations were over, the school and its surroundings were at sixes and sevens.