gentle

When used as an adjective, "gentle" usually describes a person's personality or the way something moves (like a breeze or a slope). It is almost always positive. As a verb, it is less common and specifically refers to calming down a wild animal or a nervous person. In this case, it means making them easier to manage. The meaning related to "noble birth" is very old-fashioned (archaic) and you will likely only see it in historical books or old poetry.