noun
the point in time or space at which something starts
verb
to start; to commence
adjective
initial; first
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At the beginning of the project, we outlined all the key milestones and deliverables.
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We should probably start from the beginning and go over all the details again.
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Let's go back to square one and start from the beginning.
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The beginning of a new chapter in my life filled me with excitement and anticipation.