about used when saying what the subject of something is:
She’s always talking about you.
In her novels she writes about life in South Africa.
There’s something I wanted to ask you about.
on about a particular subject:
a book on English grammar
a report on poverty in rural areas
concerning/regarding formal about:
Prince Saiid answered questions concerning Kuwait’s future.
The report raises a number of questions regarding food safety.
with regard to formal about – used especially when you want to start talking or writing about something:
Dear Sir, I’m writing with regard to your advertisement in The Times.
re used in business letters and in emails to introduce the subject that you are going to write about:
Re: Friday’s meeting
approximately more or less than a number or amount – used especially in technical or scientific contexts:
The company had total revenues of approximately $2 million.
The disease affects approximately 10% of the adult population.
roughly /ˈrʌfli/ about – used when you are trying to give someone a general idea of the size, amount, or number of something:
The two countries are roughly the same size.
Roughly how many miles do you travel a year?
around about a number or time – used when you are guessing:
I’ll be there around 5 o'clock.
The BBC broadcasts around 2,000 radio dramas every year.
somewhere/something in the region of formal about – used with very large numbers or amounts:
Last year he earned something in the region of $60 million.
It costs somewhere in the region of £100,000 to train a new doctor.
or so informal about – used after a period of time, a number, or an amount:
The journey takes an hour or so.
circa /ˈsɜːkə $ ˈsɜːr-/ formal about – used with dates a long time ago in the past:
The house was built circa 1530.
or more used after a number or amount, when the total may be a lot more:
A thirty-second commercial can cost £60,000 or more.
upwards of more than a number or amount:
The aircraft can carry upwards of 400 passengers.

[TahlilGaran] English Thesaurus ▲

with regard to
with regard to (something)
considering or relating to something.
Parents are concerned about protecting their kids with regard to stuff that is available on the Internet.

It certainly should make the law clearer with regard to what is and what is not a disability.

Related vocabulary: in terms of something

[TahlilGaran] English Idioms Dictionary ▲

with regard to something
with regard to (something)
considering or relating to something.
Parents are concerned about protecting their kids with regard to stuff that is available on the Internet.

It certainly should make the law clearer with regard to what is and what is not a disability.

Related vocabulary: in terms of something

[TahlilGaran] English Idioms Dictionary ▲

with regard to
prep. In connection with; from the standpoint of; concerning; regarding; about.
I am writing with reference to your last letter.
He spoke in reference to the Boy Scouts.
I spoke to him with regard to his low marks.
In regard to the test tomorrow, it is postponed.
Compare: IN RELATION TO, IN RESPECT TO.

[TahlilGaran] English Idioms Dictionary ▲