a guide, a leader who shows the way / guidance, providing basic instruction or helpful information / a guide who instructs / a guidebook, handbook, or manual

use one thing for many purposes / work someone hard

to use one's head

a fish

a fish / Short for 魚鱗 (gyorin): fish scales

fish / fishlike

a fish, especially when used as food / a side dish, specifically referring to fish

(archaic or dialectal) a fish

fish

Alternative spelling of 雷魚