which (of three or more) / which one /

a stone / (slang, electronics) a transistor

for grains of rice; one koku is equal to approximately 180 litres / (by extension, historical) for land of famous daimyo or samurai; one koku is also approximately 180 litres

counter for gemstones used as bearings in watches and other devices / (slang, electronics) counter for transistors, especially discrete ones

stone / needle made of stone / go stone / something solid but worthless / Short for 石見国 (Iwami-no-kuni): Iwami Province

stone; rock

Great works are performed by perseverance.

having a comeback or excuse for everything one is told, being smart in the sense of having a smart mouth

(idiomatic) just as [someone] says

as a matter of fact; to tell the truth