Idiom
Of necessity-
Meaning
unavoidable
Sentence
With these finances at my disposal I can only go in for things of necessity.
Idiom
Necessity knows to
Meaning
when a thing is necessarily required in a country
It will try to acquire the same at all means
Sentence
He stale money to satisfy his hunge because necessity knows no law.
Idiom
To make a virtue of necessity
Meaning
To laugh through what is inevitable).
Sentence
He always trics to make a virtue of necessity.