Englishfor English speakers
stimulus
Noun
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A stimulus is an event that causes a system to change its output or behavior.
The primary goal of the $31 billion economic stimulus package was to increase job growth.
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A stimulus is something that is noticed by the senses.
The mice responded with fear to the painful stimulus.
level
Adjective
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Even, flat, straight, smooth, horizontal. Having all parts equally as high as all other parts.
This table is not level: things are rolling off it.
level
Noun
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A level is a place that is higher or lower than some other places.
The room you want is on the third level of this building.
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A tool for finding out whether a surface is level.