A tuft is a cluster of something-like hair, thread, or grass-that is bunched closely together at the base and loose at the top. Pause means to stop or rest for a short time. Ajar means partly open. A nook can be a separate part of a room or small, sheltered spot away from a larger area. Jab means to poke quickly with something hard or pointed. Dim means not clear or bright, weak. A vow is a serious promise. Shoo means to make something go away. Vast means very large in size or number. A lesson is something to be learned or studied.