‘Advice’ and ‘advise’ can easily be mistaken, but the difference between the two is simple enough. In British English,

- ‘advice’ acts as a noun, defined as ‘opinion about what could or should be done about a situation or problem; counsel’, and

- ‘advise’ acts as a verb, meaning ‘to give advice’.

Therefore,

'His father’s advice was for him to give the matter thought before reaching a conclusion about what to do.' means the same as 'His father advised him to give the matter thought before reaching a conclusion about what to do.'

The ‘c’ in ‘advice’ is pronounced like the ‘s’ in ‘sip’, whereas the ‘s’ in ‘advise’ is pronounced like the ‘z’ in ‘zip’.

Some more examples of the usage of ‘Advice’

You should listen to your father’s advice.

I need your advice on what to wear for my job interview.

Mohan is the best person to ask for advice on cars.

Some more examples of the usage of ‘Advise’

My father advised me to join the army.

The doctor advised Sumit to quit smoking.

Mohan advised me to buy a diesel car.

In American English, this distinction between the two words is not always maintained.