旨

zhi

purpose, aim;

tasty, delicious

person/spoon (bi) + mouth [symbol]

both a spoon and a mouth could deliver something tasty, although they have a different purpose

扌

shou

指

zhi

finger; to point

to direct/indicate

hand (shou) + purpose (zhi)

a hand has a purpose to point with a finger thus directing the attention 

能

neng

can, be able

bear [symbol] + bear's foot [symbol]

a bear standing on his hind legs and holding up his front paws shows that he can do everything when angry

熊

xiong

bear

can (neng) + for paws of a bear [symbol]

four paws are added to 'can' to reinforce that it is about a bear