© 2026 Sloth Lingo. Learn easy. Lounge wisely.

surefire

Intermediate (B1)

IPA: /ˈʃɜːrfaɪər/

KK: /ˈʃʊrˌfaɪər/

adjective
Definition

Certain to succeed or achieve the desired outcome.


Example

This plan is a surefire way to win the competition.


Conversation
Sloth A
I think the recipe you shared is a surefire way to impress my guests.
Sloth B
I’m glad you think so! It’s one of my favorites.
Sloth A
Do you really think it’s a surefire hit, though?
Sloth B
Absolutely! Everyone loves it, you won't be disappointed.

Synonyms & Antonyms
Synonyms
foolproof
reliable
certain
Antonyms
unreliable
doubtful
uncertain
noun
Definition

A method or plan that is guaranteed to succeed or achieve a desired result.


Example

The new marketing strategy is a surefire way to increase sales.


Conversation
Sloth A
Do you think this plan is a surefire way to win the game?
Sloth B
I really hope so, but we should have a backup just in case.
Sloth A
Yeah, I feel like it's a surefire strategy if we execute it well.
Sloth B
Root Explanation

Surefire → It is formed from "sure" (from Old English *sūre*, meaning certain or secure) and "fire" (from Old English *fyr*, meaning fire). The word "surefire" means certain to succeed or guaranteed to work, as if it is as reliable as fire.

Memory Tip

Think of something that is 'certain' ('sure') to succeed, just like how fire is a reliable source of heat and light.

Visually Confused Words
refire
Is this page helpful?
Absolutely! Let's practice it a few times to make sure.

Synonyms & Antonyms
Synonyms
foolproof
certain
guaranteed
Antonyms
uncertain
doubtful
risky