The cutting edge of a plow, typically a metal blade.
A gardener’s tool, shaped like a scoop, used in taking up plants, stirring soil etc.
A mason’s tool, used in spreading and dressing mortar, and breaking bricks to shape them.
A tool used for smoothing a mold.
To apply (a substance) with a trowel.
To pass over with a trowel.
To apply something heavily or unsubtly.