What is meant by $p$ and $H$ in $pH$?

In a basic aqueous solution,if the concentration of $[OH^-]$ decreases,what happens to the $pOH$?

Which of the following statements is correct about an aqueous solution of an acid and of a base?
$(i)$ Higher the $pH$,stronger the acid
$(ii)$ Higher the $pH$,weaker the acid
$(iii)$ Lower the $pH$,stronger the base
$(iv)$ Lower the $pH$,weaker the base

What happens to the $pH$ of a basic aqueous solution if the concentration of $[OH^-]$ ions increases?

Which of the following relations is correct for a basic aqueous solution?

If $[H_3O^+] = 10^{-6} \ M$ in an aqueous solution,what is the $pH$ of the solution?