Removes a fastener from

• Allows to fluctuate, as an exchange rate
• Removes fasteners from
• Allows to rise and fall, as prices
• Removes, as from a currency control
• Removes, as from a fixed rate
• Removes fasteners
• Lets off the hook
• Lets off the hook?

Wiktionary Word definitions in Wiktionary
vb. (en-third-person singular of: unpeg )