Desperate describes a condition or state of being so its verb definition would have to be "existing in a condition of desperation", which doesn't yet exist. Therefore, you'd have to make one up—which you could, because that's how words are made.
word usage - What's the verb of "desperate"? - English Language ...
What do you call a desperate attempt unlikely to succeed? For example, when other ideas have failed and you have one final go before giving up
We did anything possible to avert disaster. [desperate, you try anything, we really didn't know what to to]. We did everything possible to avert disaster. [implies you know all the things you could do and did do to avert disaster.
I feel a bit desperate when students say things like that, I don't want them to think they waste their time. For sure, I explain my students that the main aim of the language is to convey the message and basic grammar is more than enough.
If I feel I'm lacking some kind of skills and I'm desperate to learn something, can I say "I need to recharge myself"?
Cut the price BY half would work, but loses the impact of the cutting. Cut the price TO half sounds a bit weak as it is. you could use... Slashed the price IN half Reduced the price BY half Lowered the price TO half Cut/slash works well due to creating violent and desperate imagery in the customer's mind, which leads to urgency.