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A hollow trunk in which you go.

Up which you something secret stow.

So up I roll though there's no hill.

The task is set, grab ink and quill,

And work your heart out, wear it out; debris,

It's worn on me.

'This is exhausting. I'm pooped, i'm shattered, and absolutely battered.'
'I don't know what to say to that.'

Riddle Answer A Sleeve

Riddle Explanation
up which you something secret stow - to have something up your sleeve.

so up I roll though there's no hill. The task is set - roll up one's sleeve.

and work your heart out, wear it out; debris, it's worn on me - wear your heart on your sleeve.