thin; slender; fine
unlucky
「細い」 has another reading with different meanings.
small; fine; minute
彼女は指が細くてきれいだ。
Her fingers are slender and beautiful.
この道は細いから車は通れない。
This road is narrow so cars can't pass.
細い糸で繊細な模様を編んでいるところだ。
I'm in the middle of weaving a delicate pattern with thin thread.