1
totally enclosed(adjective, tight, proof, impervious, hermetic)
1
unperforable
1
viscid
1
viscose
1
viscous
1
water-proof(adjective, tight, proof, impervious, hermetic)
1
water-repellent
0
Delphic
0
appressed(adjective, solid, tight, dense, compressed)
0
arcane
0
baffling
0
blurred
0
blurry
0
bulletproof
0
bunched(adjective, solid, tight, dense, compressed)
0
cabalistic
0
caecal
0
cagoule
0
caseous
0
circumscribed(adjective, close, solid, short, substantial)
11 years ago|4.5k views|share |citing 
APASmart Define. (2015). impermeable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/impermeable/thesaurus/synonyms
ChicagoSmart Define. 2015. "impermeable thesaurus" https://smartdefine.org/impermeable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, impermeable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/impermeable/thesaurus/synonyms>.
MLASmart Define. "impermeable thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/impermeable/thesaurus/synonyms>