No, I cannot find the word undistinguished in my dictionary. The meaning of the word distinguished as given in the dictionary is specific, distinct. Thus, undistinguished must mean ‘not specific’, ‘not distinct’.
(i) The kind of person the doctor is (money, possessions)
(ii) The kind of person he wants to be (appearance, ambition)
∆ABC is an isosceles triangle in which AB = AC. Side BA is produced to D such that AD = AB (see Fig. 7.34). Show that ∠ BCD is a right angle.