to reason
verb/ʁɐsjuˈsiˈnaɾ/medium
ra·ci·o·ci·nar
Definition
To exercise reason; to think in a logical and ordered way to reach a conclusion; to reflect.
One must reason calmly before making an important decision.
The student reasoned well and arrived at the correct solution.
Etymology
Do latim 'ratiocinari', de 'ratio' (razão).