be sufficient; be adequate, either in quality or quantity; "A few words would answer"; "This car suits my purpose well"; "Will $100 do?"; "A 'B' grade doesn't suffice to get me into medical school"; "Nothing else will serve"
bear (a cost or penalty), in recompense for some action; "You'll pay for this!"; "She had to pay the penalty for speaking out rashly"; "You'll pay for this opinion later"
give money, usually in exchange for goods or services; "I paid four dollars for this sandwich"; "Pay the waitress, please"
discharge or settle; "pay a debt"; "pay an obligation"
do or give something to somebody in return; "Does she pay you for the work you are doing?"
make a compensation for; "a favor that cannot be paid back"