Learn how to use the comparative “less reliable” and superlative “least reliable” with example sentences and differences.

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Notes from a Native English Speaker

Comparative adjectives help us to describe how good or bad something is when compared to something else. For example, something is taller than something else. Superlative adjectives help us to describe something as having the most or least of a particular characteristic within a group. This makes it easier and more accurate to talk about and compare things.

What is the comparative form of “nonreliable”?

The comparative form of “nonreliable” is “less reliable”.

Example

This source is less reliable than the others.

Example

The second-hand information is less reliable than firsthand accounts.

What is the superlative form of “nonreliable”?

The superlative form of “nonreliable” is “least reliable”.

Example

Out of all the sources, this one is the least reliable.

Example

His testimony was considered the least reliable among all the witnesses.

Why is this expression not used with most, more?

"Most" and "more" are not used with "nonreliable," "less reliable," and "least reliable." Instead, "less reliable" and "least reliable" are the appropriate comparatives and superlatives for "nonreliable." Using "most nonreliable" or "more nonreliable" would be grammatically incorrect.

Does this expression have an irregular comparative/superlative form?

"Nonreliable" does not follow a regular pattern for forming comparatives and superlatives. It is formed by adding the prefix "less" for the comparative form and the prefix "least" for the superlative form.

Expressions with similar meanings to “less reliable”

Used to describe something or someone that cannot be relied upon or trusted.

Example

The witness was deemed untrustworthy by the jury.

Used to indicate uncertainty or lack of trustworthiness.

Example

The accuracy of the information provided is highly doubtful.

Used to describe something that is not reliable due to being inconsistent or varying.

Example

The results of the experiment were inconsistent and therefore unreliable.

Expressions with similar meanings to “least reliable”

Used to describe something or someone that is the least reliable or trustworthy.

Example

The most untrustworthy source should be disregarded.

Used to indicate the highest level of uncertainty or lack of trustworthiness.

Example

The most doubtful claim in the report needs further investigation.

Used to describe something that is the least reliable due to being highly inconsistent or varying.

Example

The most inconsistent data points should be excluded from the analysis.

Using than with comparative “less reliable”

When using the comparative form "less reliable" to compare two things, you would use "than" to connect the two parts of the comparison: Example: "This source is less reliable than the others." Here, "than" is used to show that the reliability of "this source" is lower than the reliability of "the others."

How can I use this expression in context?

“less reliable” and “least reliable” can be used in a variety of situations to compare speed.
  • 1Sources

    The information from this website is less reliable than from reputable sources.

    The information from this website is less reliable than from reputable sources.

  • 2Witnesses

    Her testimony was considered the least reliable among all the witnesses.

    Her testimony was considered the least reliable among all the witnesses.

  • 3Data

    The data collected from this sensor is less reliable compared to the others.

    The data collected from this sensor is less reliable compared to the others.

  • 4Claims

    The most outrageous claim in the report is the least reliable.

    The most outrageous claim in the report is the least reliable.

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