Fat or thick; having considerable girth or a large diameter/width.
その木の幹はとても太い。
The trunk of that tree is very thick.
ケーブルが太くて丈夫だ。
The cable is thick and sturdy.
指が太いので、小さなリングは入らない。
My fingers are thick, so a small ring won't fit.
A deep, thick (sonorous) voice; low-pitched and resonant sound quality.
彼は低く太い声で話すのでよく聞き取れる。
He speaks in a low, resonant voice, so it's easy to hear him.
その歌手は太い声が特徴だ。
That singer is characterized by a thick (sonorous) voice.
Daring, shameless, or brazen; describes a bold or audacious attitude (colloquial usage).
あんな太い嘘を平然と言えるなんて信じられない。
I can't believe someone can calmly tell such a brazen lie.
彼は太い顔してまた遅刻したのに謝りもしなかった。
He had the nerve to be late again and didn't even apologize.