1.230 'certain', 'numerous', 'various'

Some other words can be general determiners, such as 'certain', 'numerous', and 'various'.

'Certain' is used to refer to some members of a group, without specifying which ones.

• We have certain ideas about what topics are suitable.

'Numerous', like 'many', indicates a large number in an imprecise way.

• Numerous attempts have been made to obscure this fact.
• ...a privilege from which numerous auxiliary benefits flowed.

'Various' is used to emphasize that you are referring to several different things or people.

• We looked at schools in various European countries.