You can ratchet down sanctions, but ratcheting down war is sometimes out of your hands.
Sean Hannity versus Michael Savage—these two conservative radio hosts have recently ratchet up their rivalry.
Though the Iran issue has been largely muted during the campaign, it is likely ratchet up again after the vote.
Every message, action and gesture seems calculated to ratchet up the anxiety of those who are listening.
At the same time, they argue that federal student loans have allowed schools to ratchet up tuition.
Drilling machines, both hand and power, hand and ratchet braces and breast-drill stocks.
The ratchet wheel and pawl shown in fig. 48 are part of the lubricator.
When the rider ceases to pedal, the chain-ring becomes stationary, but the ratchet continues to revolve.
We think a ratchet wheel should not be employed with equidistant pallets.
The ratchet of the wheel clacked, and the hurried ticking was loud.
1650s, rochet, from French rochet "bobbin, spindle," from Italian rocchetto "spool, ratchet," diminutive of rocca "distaff," possibly from a Germanic source (cf. Old High German rocko "distaff," Old Norse rokkr), from Proto-Germanic *rukka-, from PIE root *ruk- "fabric, spun yarn." Cf. rocket (n.2). Current spelling in English dates from 1721, influenced by synonymous ratch, which perhaps is borrowed from German Rätsche "ratchet."
1852, from ratchet (n.). Transferred sense attested by 1977. Related: Ratcheted; ratcheting.
To change by increments in one direction: Gold had ratcheted down to 385
[1977+; fr the ratchet action of a winch or of a wrench, where an increasing pressure, torque, pull, etc, is registered by the clicking of a pawl on a gear wheel]