adverb

rationally

rationally, logically

We need to think about this problem rationally.

We need to think about this problem rationally.

She was too upset to act rationally.

She was too upset to act rationally.

((to act/think)) ((rationally)) to do something in a logical way We must think rationally about the situation.

Synonyms: logically, reasonably, sensibly; Antonyms: irrationally, emotionally

From 'rational' plus the adverb-forming suffix '-ly', meaning 'in a rational manner'.

To act 'rationally' is to act with 'ratio' (reason, calculation), not just emotion.

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