Simple past tense and past participle of furrow.(verb)
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Use "furrowed" in a sentence
"The uvula (uvula vermis; uvular lobe) forms a considerable portion of the inferior vermis; it is separated on either side from the tonsil by the sulcus valleculæ, at the bottom of which it is connected to the tonsil by a ridge of gray matter, indented on its surface by shallow furrows, and hence called the furrowed band."
"This reaction comes with a furrowed brow -- my regular clothes and the dog don't quite fit in with a nudge from the judge."
"The question produces furrowed brows and shrugs of shoulders."