Englishfor English speakers
obstacle
Noun
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An obstacle is something that blocks your way.
race
Noun
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A race is when people compete to see who is the fastest at either driving or running.
There was a race to see who could finish first.
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A race is a group of people that come from the same place and have similar traditions.
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A race is a group of people with the same physical characteristics, such as skin color, hair color and type, etc.
race
Verb
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When a person races, he competes with other people to see who can go the fastest.
Tom was hungry, so he raced George down to the ice cream truck.