芯

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

core; heart; centre; center

pistil (of a flower)

stamen

continued alertness; unrelaxed alertness; remaining on one's guard; being prepared for a counterstroke

Esp. 残身

follow-through (e.g. in archery)

Orig. meaning

lingering affection; attachment; regret; regrets; reluctance

center of a flower (centre); pistils and stamens

dead center

(lamp) wick

padding; lining; foundation

dead center (of a baseball bat); sweet spot

spare pencil lead; pen refill (cartridge); replacement wick (e.g. of a lantern)

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

thick obi sash; sash padding

thinning (buds and branches)

eccentricity (in mechanics, electronics, etc.)

Electricity, elec. eng.

core wire; conductor

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

toilet drain outlet

cardboard tube

lead pointer (for a clutch pencil); lead sharpener

axial center; central axis

candle wick trimmer; snuffer; douter

Engineering

centering; center alignment

mentally strong; strong-willed

lead of a pencil

Colloquial; From シャーペン + 芯

mechanical pencil lead

apple core; core of an apple