rationally
UK: ˈræʃənəli | US: ˈræʃənəli
adv. in a logical, sensible, or reasonable manner
adv. based on or in accordance with reason or logic
The word "rationally" stems from the Latin ratio (meaning "reason, calculation"), which evolved into the Old French ration and later the English reason. The suffix -al transforms the noun into an adjective ("rational"), and -ly further converts it into an adverb. The progression reflects a shift from concrete calculation ("ratio") to abstract reasoning ("rational") and finally to the manner of acting ("rationally").
She argued her point rationally, without emotional bias.
The decision was made rationally after careful analysis.
He approached the problem rationally, considering all possible solutions.
Acting rationally in a crisis can prevent further complications.
The professor explained the theory rationally, making it easy to understand.