a barbed coupler
https://www.amazon.com/LTWFITTING-Brass-Splicer-Mender-Fitting/dp/B00CHI04AY/
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if your house has a crawl space, you can likely just replace the whole line without much hassle.
they're usually "add on" done after construction is complete, so it's just a hole drilled through your floor, and the hose goes down into the crawl space and then back up in the cabinet.
the tricky part is getting the new hose successfully down the old holes.