therefor
adv. C2 Proficiency there·for
adv. for that reason. You use this word in very formal or old-fashioned writing to show why something happened.
adv. for that reason or purpose. Used in formal or legal contexts to indicate a causal relationship between two clauses.
He was fined for the damage, and therefore he had to pay.
The contract was terminated, and therefore the remaining payments were cancelled.
The evidence was deemed inadmissible, and therefore the defendant's case was significantly weakened before the trial began.
Univerbation of there (“that”) + for.
See therefore.