Furrow
/fˈɜroʊ/
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Definition
(noun) Any trench, channel, or groove; often found on wood or metal.
Sentence Examples
For a long time, every furrow that was turned revealed some fragments of the fight.
The plowing is according to the furrow; the harvest, rather at random.
CEFR Practice Quiz
A deep ____ appeared on his brow as he concentrated hard on solving the complex mathematical problem.