oar
A long object consisting of a flat blade attached to a shaft or 2 blades, attached to either end of a shaft, which is held by the user. By rowing, they can be used to move boats across bodies of water.
For AIBooru purposes, this refers both to actual oars, which are mounted to a boat at a pivot, and paddles, which are not connected to a boat.
The following tags implicate this tag: holding_oar (learn more).