Select the most appropriate word to fill in the blank.

His voice was ______ by the sound of the helicopter.

drowned

The most appropriate word to fill in the blank is drowned.

The word drowned means to make something inaudible by the sound of something else. In this case, the helicopter's noise was so loud that it drowned out the man's voice. The other words in the options do not have the same meaning.

• Driven means to force someone or something to move in a particular direction.
• Drawn means to create a picture or design by making lines on a surface.
• Dawned means to become clear or understood.