塗ぬりつぶす

godan verb (-su), transitive verb

paint over; fill in; cover completely with paint

Used when covering an area entirely with paint, ink, or similar, often to hide something or to fill a shape solidly.

• 間ま違ちがえた部ぶ分ぶんを黒くろく塗ぬりつぶした。

  I painted over the mistake in black.

• 地ち図ずの海うみの部ぶ分ぶんを青あおで塗ぬりつぶしてください。

  Please fill in the ocean areas on the map with blue.