vertical furrow between the eyebrows
Refers specifically to the vertical wrinkle or crease that appears between the eyebrows, often from frowning or aging.
When he gets angry, a deep vertical furrow forms between his eyebrows.
最近、縦ジワが気になってきた。
Lately, I've become concerned about the vertical lines between my eyebrows.
Common mixed kanji-katakana spelling.
Full kanji spelling; 皺 is not a jōyō kanji and is less common.
Mixed kanji-hiragana variant.
Compound of 縦 (たて, 'vertical') and 皺 (しわ, 'wrinkle'), with the latter often written in katakana as ジワ for clarity or stylistic reasons.