backward and forward
We walked back and forth because we couldn’t find the post office.
depend on
relys on
What college you get accepted to usually depends on your academic performance in high school.
explode
to burst into pieces
The barrel full of gun powder exploded as soon as the flames reached it.
freedom
the right to make your own choices or decisions
When you turn 18, you have the freedom to make your own choices.
gasoline
liquid fuel used to make cars go gasoline prices are on the rise.
gear
the equipment needed for a certain task
When I went hiking, I had to haul a lot of gear.
main
the most important one of several similar things in a particular situation
His main responsibility is his family.
mountain bicycle
a bike specially designed for riding through rugged terrain
I like to take my mountain bicycle through rocky trails that have many hills and shallow creeks.
pedal
lever worked by the foot
The pedals on the bike fell off.
transportation
the act of moving goods or people over a distance
I'm thinking of buying a car because I'm tired of relying on the bus for transportation.
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