"Backward f" does not have a standard meaning in mathematics or any other subject that I am aware of. It is possible that it could refer to a specific concept or notation in a particular context, but without more information, it is difficult to provide a more specific answer.
In a rebus, "ecnalg" is "a backward glance".
drater is 'retard' spelled backward
Backward glance.
It's tempting to ask what you mean by backward, but unnecessary. The answer is no. Backward time travel is not possible under any circumstances.
You possibly mean 'retarded', and that means 'backward in mental or physical development.'
well , it means bending backward ! :)
One example is the word "live." It can mean "to be alive" when read forward, and "to reside" when read backward.
The backward capital E (∃) means "there exists".
it mean's wohs vt because u just how to spell it backward's simple as that
The string is in tension, but is not in compression.
running
a word, phrase, or sequence that reads the same backward as forward.