use one thing for many purposes / work someone hard

blades of grass and tree trunks / falcons

current, this, the matter in question / original, actual, base

long cylindrical things such as glasses of drink, pairs of jeans, pens or trains and buses / films or TV shows / home runs or goals / rounds of a match in boxing, wrestling or judo

Alternative form of 元

book / this / main / real / actual / true

(physics) electron gun

e-book

electronic cigarette

electronic money