The Collaborative International Dictionary of English v.0.48:
Pay \Pay\ (p[=a]), v. i.
To give a recompense; to make payment, requital, or
satisfaction; to discharge a debt.
The wicked borroweth, and payeth not again. --Ps.
2. Hence, to make or secure suitable return for expense or
trouble; to be remunerative or profitable; to be worth the
effort or pains required; as, it will pay to ride; it will
pay to wait; politeness always pays.
To pay for.
(a) To make amends for; to atone for; as, men often pay
for their mistakes with loss of property or
reputation, sometimes with life.
(b) To give an equivalent for; to bear the expense of; to
be mulcted on account of.
'T was I paid for your sleeps; I watched your
wakings. --Beau. & Fl.
To pay off. [Etymol. uncertain.]
(a) (Naut.) To fall to leeward, as the head of a vessel
(b) to repay (a debt).
To pay on. [Etymol. uncertain.] To beat with vigor; to
redouble blows. [Colloq.]
To pay round [Etymol. uncertain.] (Naut.) To turn the