noun
a word that represents a person, place, thing, or idea
preposition
a word that shows the relationship between a noun (or pronoun) and other words in a sentence
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The absence of blade on the lawnmower made it impossible to cut the grass.
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Without a blade, the lawnmower is useless for cutting the grass.
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No blade means no mowing, dude.
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In the absence of blade, his argument lacked sharpness and impact.