Idioms
An idiom is defined as - a group of words whose meaning is different from the meanings of the individual words.
Idiom:
on shaky ground
Meaning:
unstable, not secure
Example:
The man's position at the company has been on shaky ground for a long time.
List of common idioms, their meanings and examples of their usage in sentences
The language peculiar to a people or to a district, community, or class