thereby

The adverb thereby shows cause and effect: "She forgot to tie her shoes, thereby tripping and falling down the stairs."

Use thereby to connect two events: because of A, B happened: "Matt walked around with the frying pan on his head, thereby causing him to walk into a wall." Thereby is used in the infamous saying, written by Shakespeare: "And thereby hangs a tale" — a humorous way to let your listeners know they are about to hear an extremely long explanation as to why something happened.

Definitions of thereby
1

adv by that means or because of that

“He knocked over the red wine, thereby ruining the table cloth”

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