← Back to Dictionary

Sour

Podcast 1 · Introduction

Sour

adjective / verb · /saʊər/ · documentary narration

In this course, sour means having a sharp, acidic taste like a lemon. The introduction ties that sense to acid. See the Cambridge English entry and the Merriam-Webster entry. Encyclopedic background is in Taste.

Ready

Podcast 2 · Daily Use

Sour in conversation

Two British speakers · everyday usage

Ready

Podcast 3 · Prompt Engineering

Prompting with "Sour"

Instructor & developer · copy + read each prompt

Ready
1 / 3

Transcript: “Sour” vocabulary micro-course

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

Podcast 1 — Introduction & meaning

Narrator: Welcome. Today's word is sour — an adjective and sometimes a verb, pronounced SOW-er, with the IPA /saʊər/.

Narrator: Sour means having a sharp, acidic taste like a lemon; it also describes a mood turning unpleasant, or milk going off.

Narrator: In plain English, sour is the tangy taste that makes your face scrunch — and a sour mood is a cross, bad-tempered one.

Narrator: The word comes from Old English sur, meaning acid or tart, shared with many old Germanic words for the same sharp taste.

Narrator: From the taste it spread to feelings and situations — a sour expression, a deal that turned sour, a friendship gone bad.

Narrator: As a verb, to sour means to spoil or go bad — milk sours, and even a happy plan can sour over time.

Narrator: Its register is everyday and vivid, equally at home in cooking, mood, and the common idiom 'things turned sour'.

Narrator: Remember it this way: sour is sharp — on the tongue or in the mood. Sweet delights; sour bites.

Read podcasts 2 and 3

Podcast 2 — In conversation

Speaker A: I bit into that lemon tart and wow — it was far more sour than I expected.

Speaker B: Ha! A good tart should be a little sour, just enough to wake you up.

Speaker A: True. Though the milk in my coffee had gone sour, and that was not pleasant at all.

Speaker B: Quick tip — sour is the sharp taste, but it also means a bad mood. 'A sour face' means grumpy, not tangy.

Speaker A: Right. So 'sour sweets' are tangy, but 'he gave me a sour look' means he's cross.

Speaker B: Exactly. And watch the idiom — 'the deal turned sour' means it went bad, nothing to do with taste.

Speaker A: Is 'tart' a synonym?

Speaker B: For taste, close — tart is a pleasant sharpness; sour can be stronger and can also mean spoiled. Wider word.

Speaker A: Helpful. So I'll bin the sour milk and enjoy the pleasantly sour sweets.

Speaker B: Good plan — keep the tang, lose the off milk.

Podcast 3 — Prompt engineering

Speaker B: Today we'll use the word sour to prompt an AI for status states, alerts, and going-wrong scenarios.

Speaker A: Useful — I build dashboards and monitors, so a sour theme fits warnings when things go bad.

Speaker B: Let's start with a status badge.

Prompt: Design a deal-status badge with three states — fresh, watch, and sour — colour fresh green, watch amber, and sour red, so a sour deal instantly stands out on the list.

Speaker B: Naming the sour state tells the AI the exact warning level, so the red badge clearly flags trouble.

Speaker A: Useful. What about a food app?

Prompt: Build a fridge tracker that marks each item fresh or sour, warns when milk is about to go sour, and shows a sour item in red with the date it should be used by.

Speaker B: Now the database — keep names plain.

Prompt: Design a database schema for a sales app with tables for clients, deals, and notes, where each deal stores a status that can turn sour, and an index on the status for quick filtering.

Speaker A: Clear. Could one prompt build the whole tool?

Prompt: Build a simple relationship tracker where users log how each client deal is going, the dashboard highlights any deal that turned sour, and a chart shows how many went sour this month.

Speaker B: For health checks, lean on the same idea.

Prompt: Add a monitor that flags a service as sour when its error rate climbs, shows a sour red banner, lists the last failures, and suggests one quick check to bring it back to fresh.

Speaker A: One more — a feedback view?

Prompt: Create a review screen that tags feedback as sweet or sour, groups the sour reviews together, and shows the most common reason a customer's experience turned sour.

Speaker B: See the pattern: the word sour gives the AI a vivid 'gone bad' state to design around. Clear and memorable.

Speaker A: Love it. Sour means it went bad — I'll keep it for status, alerts, and warnings.