not being careful
She made some careless spelling mistakes on her essay.
congested
very crowded
At rush hour the roads are completed congested.
constant
happening frequently or without pause
It is very difficult for a person to run at a constant speed for a long period of time.
experiment
a scientific test that is performed to study something and see how it reacts to different conditions
The doctors performed many experiment on the new vaccine.
ignore
not to notice or consider someone or something
Just ignore my sister when she bothers you.
manner
(plural) acting in polite ways around other people
The woman spoke to the customers in a rude manner.
notice
to become aware of something or someone by sight, touch, hearing, or another sense
Did you notice the new trees planted in the playground?
pedestrian
any person walking on a sidewalk, across a street, or down a road
In America, most pedestrians have the right of way; this is not true in some other countries.
sidewalk
a path with a hard surface beside one or both sides of a road, that people walk on
I like to keep the sidewalk in front of my house clear so people can pass by easily.
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