芯 - wick

wick; marrow; staple (for stapler); (pencil) lead; stuffing; pith

wick of a candle

mechanical pencil lead

apple core; core of an apple

staple (for a stapler)

collar core (stiff fabric, etc. inside a collar)

lead pointer (for a clutch pencil); lead sharpener

dead center (of a baseball bat); sweet spot

dead center

toilet drain outlet

centering; center alignment

Chinese water spinach (Ipomoea aquatica); ong choy; kang kong; water morning glory; water convolvulus; swamp cabbage; hung tsai; rau muong; pak boong; swamp morning-glory