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inviscid

Upper-Intermediate (B2)

IPA: /ɪnˈvɪsɪd/

KK: /ɪnˈvɪsɪd/

adjective
Definition

Describing a fluid that does not have any resistance to flow, meaning it can move without any internal friction.


Example

In fluid dynamics, we often study inviscid flows to simplify the analysis of fluid motion.


Conversation
Sloth A
Have you ever heard about inviscid fluids in physics?
Sloth B
Yeah, I think they are really interesting!
Sloth A
It's amazing how they have no viscosity at all.
Sloth B
Exactly! I wonder how that affects their behavior in different situations.

Synonyms & Antonyms
Synonyms
frictionless
smooth
ideal
Antonyms
viscous
thick
sticky
Root Explanation

Inviscid → It is formed from "in-" (meaning not) and "viscid" (from Latin "viscidus", meaning sticky or adhesive). The word "inviscid" means not sticky or having no viscosity.

Memory Tip

Think of 'not' ('in-') being combined with 'sticky' ('viscid') to remember that 'inviscid' refers to something that is not sticky.

Visually Confused Words
viscid
nonviscid
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