IPA: /ˈwɪf.əl.tɹiː/
KK: /ˈhwɪfəlˌtri/
A horizontal bar that swings and connects the harness of a draft animal to a vehicle or tool, allowing it to pull the load.
The farmer adjusted the whiffletree to ensure the horse could pull the plow smoothly.
The word 'whiffletree' originates from the combination of 'whiffle' (from the dialectal English 'whiffle', meaning to move lightly or flutter) and 'tree' (from Old English 'treow', meaning a wooden structure or beam). A whiffletree is a light wooden beam used in horse-drawn vehicles to connect the traces to the vehicle, allowing for a fluttering or light movement of the harness.
Imagine a light beam ('whiffle') that helps connect and move things easily ('tree') — that's what a whiffletree does.