to rise to the surface; to surface
to stand out (e.g. against a background)
雨で文字が石に浮き出た。
The inscriptions surfaced on the stone after the rain.
運動すると、腕に血管が浮き出てくる。
When you exercise, veins stand out on your arms.
光にかざすと、紙の透かし模様がくっきりと浮き出る。
When held up to the light, the watermark design on the paper clearly emerges.