hefty

19th century. From heft (“weight”) +‎ -y.

The similarity with German heftig (“vigorous, violent, intense”) is apparently coincidental. From the German are Dutch, Danish, Norwegian heftig, Swedish häftig.

• IPA^(key): /ˈhɛfti/

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hefty (comparative heftier, superlative heftiest)

1. Heavy, weighing a lot.

   She carries a hefty backpack full of books.

2. Heavy, strong, vigorous, mighty, impressive.

   He can throw a hefty punch.

   • 1934 Frank Richards The Magnet, Kidnapped from the Air

     The Remove dormitory echoed to the old, familiar sound of Bunter's hefty snore.

3. Strong, bulky.

   They use some hefty bolts to hold up road signs.

4. (of a person) Possessing physical strength and weight; rugged and powerful; powerfully or heavily built.

   He was a tall, hefty man.

• Nouns to which "hefty" is often applied: price tag, premium, profit, price, penalty, fine, portion, salary, gain, increase, amount, sum, check, fee.