Haggle (verb)

1. To argue or bargain persistently over the cost of something.
2. To cheat or defraud by quibbling over the terms of a bargain.

Origin:

Middle english hagelen, from old english hægelian to hack, chop, from hægel hag, from germanic *hagalaz; akin to old high german hagal hag, old english hægtesse harlot.

Examples:

1. She haggled with the vendor over the price of the carpet.
2. The customer haggled with the salesperson to get a better deal.
3. He haggled with the seller to get a lower price.
4. They haggled over the price of the car for an hour.
5. I haggled with the store owner to lower the price of the painting.