角

jiao

horn; angle

角度 angle (math/physics); 三角 triangle; 鹿角 deer antlers;

角色 role (in a play/movie); 口角 quarrel (lit. "mouth corners" 

 a person takes a measuring tool for checking the angle of a horn

牛

niu

cow, ox, bovine

bull's head with horns

解

jie

to untie, to loosen

solve, understand;

separate

"To untie" (解開);  "To separate" (分解); 解體 "To disintegrate"

"To explain" (解釋) - metaphorically "loosening" confusion

 horns (角) are cut off with a knife (刀) from a cow (牛) to separate the toughest part and to try understand it how strong it is

石

shi

stone, rock, mineral

石头 stone/rock (common spoken term)

岩石 cliff/rock (geological term)

宝石 gemstone/jewel (lit. treasure stone)

石油 petroleum/oil (lit. stone oil)

under a cliff there is a block of stone

确

que

certain, sure, firm

准确 accurate/precise; 确认 to confirm 

a stone (石) for testing horns (角) to be sure and certain how firm they are

此

ci

this, these

此 encodes physical grounding (止 = foot) + pointing (匕) with a ladder, mirroring how humans naturally indicate "this" by stopping and gesturing

嘴

zui

mouth, beak

鸟嘴 bird’s beak;  多嘴 talkative; 

闭嘴 shut up (lit. close mouth)

嘴硬 stubborn (lit. “mouth hard” – refuses to admit fault)

a mouth (口) and a beak (觜) are almost the same

觜

zi

beak

THIS (此) sharp horn (角) from a bird is its beak