to dry up; to shrivel (up); to go (completely) dry
to wither (of talents, feelings, etc.); to become desiccated (e.g. of ideas)
長期間日光に当たると干涸びる。
It dries up when exposed to sunlight for a long time.
長い日照りで池の水が干涸びた。
The pond dried up from the long drought.
庭に放置したリンゴが干涸びている。
The apple left in the yard has shriveled up.