TOEFL 4-1

friction

• abrasion

• peasant

• puzzle

• capital

consultant

• adviser
• punishment
• possession
• custom

constitute

• amount to
• concentrate on
• lean against
• throw into confusion

ancestry

• ancestor
• poem
• bravery
• variety

debatable

• arguable
• potential
• affirmative
• satisfactory

abound

• be plentiful
• hold back
• dry up
• come around

prosper

• be successful
• be careful
• be quick
• be the center

frontier

• border
• organ
• signal
• theme

alert

• careful
• original
• angry
• brown

genre

• category
• content
• abstract
• mass