The story
From half- (prefix meaning ‘half, partial; not complete’) + timbered.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: Of a building: constructed using a load-bearing timber frame with the spaces (panels) between the timbers filled with bricks, stone, or wattle and daub, etc. (the infill), especially if the timber frame is visible on the outside of the building. Full definition →
From half- (prefix meaning ‘half, partial; not complete’) + timbered.
Etymology from Wiktionary, CC BY-SA 4.0.