reason
n//ˈɹiːzn̩//grund, skäl, anledning, motiv, orsak, förstånd, förnuft, resonera, diskutera, slutleda, argumentera
An excuse: a thought or a consideration offered in support of a determination or an opinion; that which is offered or accepted as an explanation.
That which causes something: an efficient cause, a proximate cause.
(uncountable) Rational thinking (or the capacity for it); the cognitive faculties, collectively, of conception, judgment, deduction and intuition.
(intransitive) To deduce or come to a conclusion by being rational.
(intransitive) To perform a process of deduction or of induction, in order to convince or to confute; to argue.
(transitive) To persuade by reasoning or argument.
(transitive, usually with out) To find by logical process; to explain or justify by reason or argument.