← Back to Dictionary

Unreasonable

Podcast 1 · Introduction

Unreasonable /ʌnˈriː.zən.ə.bəl/ · adjective

A short documentary narration — meaning, origin, and how the word is used.

In this course, unreasonable means not guided by good sense — unfair, excessive. The introduction ties that sense to unfair. See the Cambridge English entry and the Merriam-Webster entry. Encyclopedic background is in Unreasonable.

Ready
Podcast 2 · Daily Use

In Conversation

Two British speakers using "unreasonable" naturally in everyday talk.

Ready
Podcast 3 · Prompt Engineering

Prompting with "unreasonable"

An instructor and developer explore real, copy-ready AI prompts built around the word.

Ready
1 / 3

Transcript: “Unreasonable” vocabulary micro-course

Read along with the three podcasts, or open the full dictionary entry for Unreasonable for the definition, Arabic meaning, synonyms and example sentences.

Podcast 1 — Introduction & meaning

Narrator: Today's word is "unreasonable" — an adjective, pronounced /ʌnˈriː.zən.ə.bəl/, with the stress on 'rea'.

Narrator: Unreasonable means not guided by good sense — unfair, excessive, or beyond what is acceptable or rational.

Narrator: In plain English, something unreasonable is over the top or unfair — an unreasonable demand, an unreasonable price.

Narrator: It can describe a person who won't listen to reason, or a thing that's simply too much — too costly, too demanding.

Narrator: The word combines 'un-', meaning not, with 'reasonable', from 'reason', via Latin 'ratio', meaning calculation or judgement.

Narrator: So at its core, unreasonable means lacking reason — not weighed by fair, sensible judgement.

Narrator: It is common in everyday disputes and in law, where a 'reasonable person' is a key standard of fairness.

Narrator: In tone it is everyday but firm — a measured way to call something unfair, excessive, or out of proportion.

Narrator: So remember: unreasonable means not guided by good sense — unfair, excessive, or beyond what's acceptable.

Read podcasts 2 and 3

Podcast 2 — In conversation

Speaker A: They want the whole project finished by Friday — honestly, that's a completely unreasonable deadline.

Speaker B: That does sound unreasonable — far too much to ask in so little time.

Speaker A: Exactly. And the price they quoted was unreasonable too — nearly double the going rate.

Speaker B: Right, there it means excessive. A common mistake is confusing 'unreasonable' with simply 'difficult'.

Speaker A: Ah — a difficult task is just hard, but an unreasonable one is unfair or excessive?

Speaker B: Exactly. Something can be difficult yet perfectly reasonable. Unreasonable adds that unfairness.

Speaker A: Good distinction. And it describes people too — 'he's being completely unreasonable'.

Speaker B: Yes — refusing to listen to sense. The opposite of fair-minded.

Speaker A: Close synonyms? 'Excessive', 'unfair', and 'irrational'.

Speaker B: Though 'irrational' suggests no logic at all, while 'unreasonable' is more about being unfair or over the top.

Speaker A: So unreasonable means unfair, excessive, or beyond sense.

Speaker B: More than is fair to ask.

Podcast 3 — Prompt engineering

Speaker B: Let's use "unreasonable" in AI prompts — it is precise for setting limits and validation: catching excessive values, rejecting unfair inputs, flagging anything out of acceptable bounds.

Speaker A: So unreasonable in a prompt means flag or reject values that are excessive or out of bounds?

Speaker B: Exactly. For validation, you'd write:

Prompt: Add validation that rejects unreasonable inputs in my booking form. Block unreasonable dates far in the past or future, and an unreasonable guest count over the room's limit, with a clear message explaining each limit.

Speaker B: The word unreasonable defines the rule by fairness — not just wrong, but beyond sensible bounds.

Speaker A: Very clear. What about rate limiting?

Speaker B: Try this:

Prompt: Protect my API from unreasonable usage. Set a fair rate limit per user, and block any client making an unreasonable number of requests per minute, returning a polite message rather than letting it overload the server.

Speaker A: So it guards against excess.

Speaker B: Right. For pricing:

Prompt: Add a sanity check that flags unreasonable prices before they save. If a product price is unreasonable — negative, zero, or wildly above the category average — warn the admin to confirm before publishing.

Speaker A: What about query limits?

Speaker B: Here you go:

Prompt: Stop unreasonable database queries in my reporting tool. Reject any request for an unreasonable date range, like ten years of data at once, and suggest a sensible smaller range to keep the report fast.

Speaker A: Could unreasonable guard file uploads too?

Speaker B: Yes:

Prompt: Validate uploads and block unreasonable files. Reject an unreasonable file size over the limit and unsupported types, with a friendly message telling the user the acceptable size and formats.

Speaker A: So "unreasonable" means excessive or out-of-bounds values to catch.

Speaker B: Exactly — a precise word that grounds limits and validation in fair, sensible bounds.