Synonyms of impermeable

impermeable

adjective

(ˌ)im-ˈpər-mē-ə-bəl 

1

as in dense

impossible to get through or into

the wall of security people surrounding the rock band was impermeable

Synonyms & Similar Words

• dense
• impervious
• impenetrable
• impassable
• thick
• close
• sturdy
• impregnable
• impassible
• tight
• compact
• substantial
• compressed
• solid
• frozen
• tough
• rigid
• hard
• condensed
• stiff
• inflexible
• unyielding
• firm
• unbending

Antonyms & Near Antonyms

• permeable
• negotiable
• soft
• passable
• elastic
• penetrable
• flexible
• giving
• porous
• malleable
• pliable
• yielding
• absorbent
• squishy
• bendable

2

as in tight

not allowing penetration (as by gas, liquid, or light)

an impermeable seal on the ancient tomb had preserved the artifacts exceptionally well

Synonyms & Similar Words

• tight
• impervious
• thick
• impenetrable
• dense
• close
• watertight
• compact
• airtight
• hermetic
• leakproof
• snug
• waterproof
• soundproof
• hermetical
• lightproof

Antonyms & Near Antonyms

• permeable
• porous
• pervious
• penetrable
• absorbent
• leaky
• unsealed

Examples of impermeable in a Sentence

Recent Examples on the Web

Smart home security systems are more accessible than ever, with entry sensors, cameras, doorbells and more combining to form an impermeable shield of safety. —K. Thor Jensen, PCMAG, 21 Mar. 2024

The cap could include hard paved courts, a parking area and playgrounds built on impermeable surfaces. —Karl Schneider, The Indianapolis Star, 20 Mar. 2024

The soil mix wall acts as an impermeable barrier where water and pollutants cannot pass through. —Caitlin Looby, Journal Sentinel, 22 Jan. 2024

Fracking is a technique used to extract natural gas or oil from impermeable rock formations. —Samantha Hendrickson, Quartz, 26 Feb. 2024