October 2026 - Idioms Study Guide

Core ideas to know

Learn the relationships, not a string of isolated definitions. These are the facts that let you reason through unfamiliar wording.

• Idioms are nonliteral: “on the fence” describes indecision, not a physical location.
• Most idioms are fixed expressions; changing a preposition or key word can make the phrase nonstandard.
• Context determines whether an expression is literal or idiomatic. “Break the ice” can describe ice or ease social tension.
• Register matters: idioms common in conversation may be inappropriate in formal or clinical writing.
• The correct paraphrase carries the same attitude and degree, not merely the same broad topic.

A reliable way to answer

Use the same short process every time so the wording of the question does not decide your method for you.

1. Notice whether the literal reading is impossible or irrelevant in context.
2. Read the surrounding sentence for the result, emotion or contrast associated with the phrase.
3. Replace the entire expression with one plain phrase.
4. Check that the replacement preserves tone, strength and grammar in the sentence.

Distinctions that earn marks

Terms to know

Idiom

A conventional expression with a meaning beyond its literal words.

Literal

Using the ordinary, direct meaning of the words.

Register

The level of formality appropriate to a setting and audience.

Key points

• Interpret an idiom as one unit rather than word by word.
• Use the surrounding result or reaction to infer meaning.
• Replace informal idioms with direct language in professional writing.