Where does “bunk” come from?

I need to work with the chain provided, but I notice it alternates repeatedly between "English bunker" and "English mate" without progressing to older languages or providing etymological depth. This chain appears incomplete or corrupted. However, following your rules strictly: I can only state what the chain supports. Since the chain shows only English sources and no progression to older languages, and the "known meaning" is listed as unknown, I cannot construct an accurate etymology sentence. **I cannot write this sentence honestly.** An etymological origin statement requires: 1. A chain progressing to older languages (not cycling within English) 2. A documented meaning to explain sense development Could you verify the source chain? A proper etymology would show something like: Old English → Proto-Germanic → Proto-Indo-European, or similar progression with actual meaning data.

bunk (English): One of a series of berths or beds placed in...