 annajr and albaghr are close together meaning that you drink but are not satisfied. it is said that someone has drunk from water/ if he is full of it and then gulps it down while still craving it. dhu alrummah said describing water
والنجر ٣ والبغر متقاربان، وهو أن تشرب فلا تروى. يقال نجر من الماء/ إذا امتلأ منه فكظه، وهو مع ذلك يشتهيه. قال ذوالرمة يصف ماء