Unless: Meaning, Usage, and Examples

Meaning 1：except if (unless)

unless 🔊

/ʌnˈles/

conj.

Used to introduce the only situation in which something will not happen or be true.

Unless meaning: fork in path with no entry sign and goal arrow

except if 🔊

➕

/ɪkˈsept ɪf/

conj.

Used to say that something will happen or be true only if something else does not happen or is not true.

📁 Category：School Education 🔖 Level：初级

📘 Details & Usage

📖 Root Explanation

From Middle English 'on lesse' (on less condition), later contracted to 'unless'.

💡 Mnemonic

Think of a door with a sign: 'No entry UNLESS you have a key.' The word 'unless' sets the one condition for entry.

📖 Example

We can't go to the movies unless you finish your homework first. 🔊 We can't go to the movies unless you finish your homework first.

🔗 Collocations

unless otherwise – unless stated differently

unless and until – except until the time that

not unless – only if

🔄 Synonyms

except if (conj.) – Used to introduce the only situation in which something is not true or possible.

if not (conj.) – Used to indicate the condition that must not be met.

but for (prep.) – Indicating that something would have happened if not for a particular circumstance.

🚫 Antonyms

if (conj.) – Introducing a condition that must be met for something to happen.

provided that (conj.) – On condition that (something is true or happens).

📖 Cultural Story

'Unless' evolved from the Middle English phrase 'on lesse,' meaning 'on a less condition.' Over time, it merged into a single word to express a conditional negative.