←
Old English bord (inherited)←
Old English byrde (inherited)←
Middle English beren (affix)←
Middle English -th (affix)←
Middle English buyrde (alter)←
Middle English buirde (alter)←
Middle English birde (alter)←
Middle English byrde (alter)←
Middle English byurde (alter)←
Middle English berde (alter)←
Old French bourde (borrowed)→
English birth (mention)→
English burd (inherited)→
Middle English burden (affix)→
Middle English bord (alter)→
Middle English bourde (alter)