This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Designed to be folded up for easy storage: a foldaway bed.

adj. That may be folded away when not in use.

adj. capable of being folded up and stored

"It took 860 reports of ladders breaking and 28 injuries before Frontgate recalled foldaway ladders that had been on the market for five years."

collapsible    collapsable   

metal-framed    queen-sized    queen-size    fold-up    steep-roofed