Decorated with or having recessed panels or coffers, especially in ceilings or walls.
From 'coffer' (Old French cofre from Latin cophinus) plus the suffix '-ed' (from Old English -ed). The adjective form became common in architectural terminology to describe ceiling treatment.
Coffered ceilings were the MacBook Pro of medieval architecture—expensive, sophisticated, and people who had them wanted everyone to know it because they were visibly impressive from every angle!
Complete word intelligence in one call. Free tier — 50 lookups/day.