1.powerful

(of person) possessing physical strength

⇔ muscular, strong, rugged and powerful

eg) a tall, hefty man.

a hefty boxer

2. heavy :

of considerable weight

eg) She carries a ~ backpack full of books.

a ~ dictionary

3. sizable:

large in amount or extent or degree

⇔ considerable, respectable, goodly, tidy

eg) received a hefty bonus

a hefty fine of $10,000

▲ rugged :

1) covered with rocks : ~cliffs

2) if you describe a man as rugged, he has strong and masculine features.(다부진) : ~ face

3) someone’s character as rugged, : 단호한 ~ individualism

4) a rugged piece of equipment : 튼튼한 ~ outdoor clothing