© 2026 Sloth Lingo. Learn easy. Lounge wisely.

ultraefficient

Upper-Intermediate (B2)

IPA: /ˌʌl.trə.ɪˈfɪ.ʃənt/

KK: /ʌltrɪˈfɪʃənt/

adjective
Definition

This word describes something that works in a very effective way, achieving maximum results with minimal waste or effort.


Example

The new engine design is ultraefficient, using less fuel while providing more power.


Conversation
Sloth A
Have you seen that new washing machine?
Sloth B
Yeah, I heard it's ultraefficient with energy consumption.
Sloth A
I think I might get one to save on my bills.
Sloth B
That's a smart idea! It would definitely help cut costs.

Synonyms & Antonyms
Synonyms
optimal
effective
productive
Antonyms
inefficient
wasteful
unproductive
Root Explanation

Ultraefficient → It is formed from "ultra-" (meaning beyond or extreme) and "efficient" (from Latin "efficere", meaning to accomplish or to bring about). The word "ultraefficient" means extremely effective or capable of achieving maximum productivity with minimal waste.

Memory Tip

Think of 'ultra-' meaning beyond, and 'efficient' meaning to accomplish something well — together, they describe something that works extremely well.

Visually Confused Words
unefficient
Is this page helpful?