derivating opposite of aching

[Jon]

Hello,

Could you help me to find an opposite for the adjective "aching"
may be unaching ????

thanks

[Conchita]

'Healthy', perhaps?

[Jon]

yes, thanks a lot...

But I'm interested in derivatives adjectives, any idea??

v. ache --> adj. aching --> opposite " ______ "

[Toefl]

[Lost_Soul]

I guess Jon is looking for a verb opposite to ache, and then he wants to form an adjective from it by adding ing at the end. (like hating -> loving)
But I can't thing of one. - a tough question !