Answer
kilo.
Work Step by Step
The metric prefix for $1000$ is kilo. For example, we use it to change grams to kilograms (1000 grams).
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.