可

ke

can, may; buT, yeT

one can shout with one's mouth wide open, but without any success yet 

可

ke

哥

ge

elder brother

elder brother, or can-can brother, likes to shout in the house; originally it meant to sing

欠

qian

yawn

mouth wide open on a person

歌

ge

song; to sing

sing/elder brother (ge) + yawn (qian)

instead of shouting, can-can brother now yawns and sings like in an opera house 

亻

ren

何

he

whaT; why; how

person (ren) + can (qe)

what a person can do;

but why a person may do it;

yet how a person may do it;

河

he

river

water (shui) + can (ke)

a water can move like a river

阝

fu

阿

a

big hill;

affectionate prefix; flattery

hill (fu) + can (ke)

啊

a

ah

this character is sometimes used at the end of a sentence to indicate surprise or question