furrowing
fur-row-ing
verb
Creating long, narrow grooves or wrinkles on a surface or skin.
"His brow was furrowing in deep thought."
noun
The act or process of making furrows, grooves, or wrinkles.
"The constant furrowing of the field prepared it."
Thesaurus
Synonyms: furrow, crease, wrinkle, crinkle, seam, line, groove, rut, chamfer, chase