高低

height / altitude (aviation) / pitch (music) / ups and downs (success or failure) / whether sth is right or wrong / comparative strength, weight, depth, stature / (spoken interjection) anyway, whatever / eventually, in the end

surname Gao

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

low / beneath / to lower (one's head) / to let droop / to hang down / to incline

uneven bars (gymnastics)

can't recognize tall or short (idiom); doesn't know what's what

can't reach the high or accept the low (idiom); not good enough for a high post, but too proud to take a low one

the tide / high and low water

high and low / uneven (in height) / uneven (of ground)

lit. to fight it out with sb to see who is best (idiom) / fig. to cross swords with / to lock horns