Standard Lemma guide

impermeable

adj · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • Received-Pronunciation: /ɪmˈpɜːmɪəbəl/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • Multicultural British English Recorded audio is listed in the source snapshot.
  • Canada, General-American: /ɪmˈpɝmɪəbəl/
  • Canada, General-American: /ɪmˈpɝmiəbəl/
  • Australian: /ɪmˈpɜːmɪəbəl/

1

adj

Meaning 1

Impossible to permeate.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

adj

Meaning 2

Not allowing passage, especially of liquids; waterproof.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

adjective

Meaning 3

preventing especially liquids to pass or diffuse through

Definition source: Princeton WordNet 3.0

Examples

  • impermeable stone
  • an impermeable layer of scum
  • a coat impermeable to rain

Meaning relationships

Synonyms: none provided

Antonyms: permeable

History

Etymology

Apparently from im- + permeable. Compare French imperméable, from Latin impermeābilis, from im- + permeābilis (“permeable”).

Across languages

Translations

37 source translations are retained for this English entry.

  • Belarusian: непранікальны (njepranikalʹny) — impossible to permeate
  • Bulgarian: непроницаем (nepronicaem) — impossible to permeate
  • Bulgarian: херметичен (hermetičen) — impossible to permeate
  • Catalan: impermeable — impossible to permeate
  • French: imperméable — impossible to permeate
  • Galician: impermeábel — impossible to permeate
  • German: dicht — impossible to permeate
  • Greek: αδιαπέραστος (adiapérastos) — impossible to permeate
  • Indonesian: kedap — impossible to permeate
  • Irish: neamh-thréscaoilteach — impossible to permeate
  • Irish: neamhscagach — impossible to permeate
  • Latin: impermeābilis — impossible to permeate
  • Malay: tak telap — impossible to permeate
  • Māori: tukukore — impossible to permeate
  • Portuguese: impermeável — impossible to permeate
  • Russian: непроницаемый (nepronicajemyj) — impossible to permeate
  • Spanish: impermeable — impossible to permeate
  • Swedish: ogenomtränglig — impossible to permeate
  • Swedish: tät — impossible to permeate
  • Tagalog: dimatulot — impossible to permeate
  • Welsh: anathraidd — impossible to permeate
  • Belarusian: непрамакальны (njepramakalʹny) — not allowing passage of liquids
  • Bulgarian: непромокаем (nepromokaem) — not allowing passage of liquids
  • Catalan: impermeable — not allowing passage of liquids
  • Finnish: läpäisemätön — not allowing passage of liquids
  • French: imperméable — not allowing passage of liquids
  • Galician: impermeábel — not allowing passage of liquids
  • German: dicht — not allowing passage of liquids
  • Greek: αδιάβροχος (adiávrochos) — not allowing passage of liquids
  • Irish: neamh-thréscaoilteach — not allowing passage of liquids
  • Portuguese: impermeável — not allowing passage of liquids
  • Russian: непромока́емый (nepromokájemyj) — not allowing passage of liquids
  • Spanish: impermeable — not allowing passage of liquids
  • Swedish: ogenomtränglig — not allowing passage of liquids
  • Swedish: tät — not allowing passage of liquids
  • Swedish: vattentät — not allowing passage of liquids
  • Tagalog: dimatulot — not allowing passage of liquids