Sentence:  Now the only way in which all curves of the image family of * * f can <WSD>pass</WSD> through a fixed point is to have a generator of * * f which is not a secant but a tangent of \ g , for then any point on such a generator will be transformed into the point of tangency . 
Meaning of the word marked with <WSD> tags:  stretch out over a distance, space, time, or scope; run or extend between two points or beyond a certain point