Meanwhile, Link thinks that 'glue' sounds like an odd word for 'hand'. But he'll roll with it.

But yes, he does know what she means. These are abilities he knows well.

"...Not my abilities," he says softly. "They belonged to the Zonai arm. I don't have it anymore. But...I got Fuse back."

An ability Shu would be familiar with, having seen it in action whenever Link attached one of his elemental fruits to an arrow.