Definition

To make something more reasonable or logical, often by explaining it in a way that seems sensible.

Example

She tried to rationalise her decision to leave the job by saying it was for her own good.

Tense Forms

Conversation

I've been trying to rationalise my spending habits lately.

That sounds like a good plan! What have you come up with?

I think I need to cut down on impulse purchases.

Definitely! It helps to have a clear budget in mind.

Synonyms & Antonyms

Root Explanation

Rationalise → It is formed from "rational" (from Latin "rationalis", meaning reasonable or logical) and "-ise" (a suffix used to form verbs indicating the process of making or becoming). The word "rationalise" means to make something reasonable or logical, often by providing justifications or explanations.

Memory Tip

Think of making something 'reasonable' ('rational') and then adding the process of doing that ('-ise'). This helps you remember that to rationalise means to make something logical or justifiable.

Visually Confused Words