Examine the dictionary entries for ‘race’:

race n. 1 a competition between

runners. 2 a strong or rapid current flowing through a narrow channel. 3 a

water channel, esp. one in a mill or mine …

race n. 1 each of the major

division of humankind, having distinct physical characteristics. 2 a group of people

of things with a common feature …  

race n. a ginger root (dated)

The relationship between race as ‘a competition between runners’ and race

as ‘a ginger root’ can be characterized

as …