高下

relative superiority (better or worse, stronger or weaker, above or below etc)

surname Gao

high / tall / above average / loud / your (honorific)

down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action

equally matched / not much to distinguish who is stronger

to compete against / to measure oneself against / to go head to head (see who is best)