Archaic KJV Word
Furniture
Modern equivalent: equipment
What Was Lost
Rachel hid stolen idols in the camel's furniture -- the saddlebags and packing gear loaded on the animal. Modern readers picture Rachel stuffing teraphim behind a sofa. The tabernacle's furniture was its sacred equipment: the ark, the lampstand, the altar -- functional worship instruments, not decoration.
Closest Survivor in Modern English
furnish (the verb 'to furnish' still means 'to equip/provide' beyond just furniture)
Peak Usage (1611)
KJV Genesis 31:34 -- 'Rachel had taken the images, and put them in the camel's furniture'; Exodus 31:7 -- 'The tabernacle and all the furniture thereof'
Died ~1800
Narrowed from 'equipment/fittings/provisions/gear' (French fourniture 'supplies') to 'household tables and chairs,' domesticating a word that once meant full outfitting for any purpose.
What Replaced It
“equipment”
Military/industrial; furniture-as-equipment covered personal gear, saddlebags, provisions
“furnishings”
Decorative; the original furniture was functional gear for travel, worship, or war
“supplies”
Consumable; furniture-as-gear meant durable equipment you carried and used