Robots hummed, machines whirred.

Meaning: This sentence describes the sounds that machines make when they are working.

Choice of Words: The words "hummed" and "whirred" are both onomatopoeia, which means they imitate the sounds that the machines are making. "Hummed" is a low, continuous sound, while "whirred" is a higher-pitched, more rapid sound.

Alternative Expressions

Related Expressions

• Machines hummed, robots whirred.
• Machines hummed with contentment.
• The robot beeped and whirred as it worked.
• The washer whirred loudly, washing clothes.
• Drill whirred, soft buzzing filled air.
• The blender whirred loudly, mixing ingredients for a smoothie.
• Robots danced with mechanical grace.
• Its wheels whirred smoothly along floor.
• Sensors whirred, taking in the room.
• Robots fight aliens.