verb · to stretch forward or poke out a part of the body

他从窗口探出头来。

verb · to visit someone, often to check on their well-being

过年了，他带了一些礼物去探了探几位老邻居。

verb · to explore, search out, or scout for information or locations

我打算一个人进那个古老的山洞里探个究竟。