4 syllables: Im, per, vi, ous. Stress on per.
im-PUR-vee-uhs
/ˌɪˈmpɝviəs/
Impervious is pronounced im-PUR-vee-uhs (/ˌɪˈmpɝviəs/). It has four syllables (Im-per-vi-ous), with the stress on "per". Impervious is an adjective meaning unable to be affected by something; it describes objects or people that resist influence, penetration, or damage. It often conveys a sense of impermeability or emotional insensitivity, suggesting an obstacle or shield against external forces. In use, it can describe materials, conditions, or attitudes that remain unaffected under stress or scrutiny.
adjectiveImpervious is an adjective meaning unable to be affected by something; it describes objects or people that resist influence, penetration, or damage. It often conveys a sense of impermeability or emotional insensitivity, suggesting an obstacle or shield against external forces. In use, it can describe materials, conditions, or attitudes that remain unaffected under stress or scrutiny.
"The raincoat is impervious to water, keeping you dry in a downpour."
"Despite the critics' questions, she remained impervious to doubt and pressed on with her plan."
"The metal coating made the surface impervious to corrosion."
Say im-PUR-vee-uss with stress on the second syllable. IPA: US/UK: ɪmˈpɜːviəs. Begin with a short, lax 'i' in the first syllable, then a clear schwa-less 'er' sound for the stressed syllable, followed by 'vi' and a final 'əs' ensemble. Picture the mouth opening wide for the /ɜː/ as in 'hurt', with the tongue mid-back, lips relaxed. For precision, use a light rolling of the /r/ in rhotic accents. Audio resources like Pronounce or dictionary apps can help map the exact timing of the /ˈ/ stress mark.
Common errors include misplacing stress (e.g., im-PER-vi-ous vs. im-pER-vi-ous), mispronouncing the middle vowel as a full /ɜː/ without proper r-coloring in non-rhotic accents, and slurring the ending /əs/ into a quick /əs/ or /əs/. Correct by keeping the secondary stress on the second syllable and clearly articulating /ɜː/ with a lengthened vowel before /viəs/. Practice with minimal pairs contrasting clear vs. reduced vowels to lock in the rhythm.
In US English, /ɪmˈpɜːviəs/ with rhotic r; in UK English, /ɪmˈpɜːviəs/ with non-rhotic r (often sounding closer to /ɪmˈpɜːvjəs/); in Australian English, /ˌɪmpəˈviːviəs/ with more centralized vowels and a somewhat lighter /r/ or non-rhoticity depending on speaker. The second syllable carries primary stress in all, but vowel quality shifts: US tends to clearer /ɜː/ and rhotic r; UK is similarly /ɜː/ but with less rhoticity; AU may reduce the middle vowel to /ə/ and lengthen the final /iə/ or /jəs/ depending on rate.
Two main challenges: the mid-stressed /ɜː/ vowel with precise r-coloring and the final /viəs/ cluster, which requires a smooth transition from a consonant to a rounded /ə/ glide and a trailing /s/. The placement of stress immediately after the first consonant cluster can tempt English speakers to shift stress or de-emphasize the /ɜː/; keep the nucleus strong on the second syllable. Listening to native samples and practicing with slow tempo helps cement accurate mouth positions.
Impervious hinges on a two-part nucleus: a strong second-syllable /ˈpɜː/ or /ˈpɜː/ that carries the vowel length and rhotic coloring (US) or compacted rhoticity (UK). The final /viəs/ requires a rapid but distinct sequence where /v/ flows into /i/ and then to a light /əs/ or /əs/ depending on speech rate. Ensure the /ɜː/ remains long and that /vi/ is clearly articulated rather than merged.
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Impervious comes from the Latin impervius, formed of in- (not) + pervius (allowing passage, open). The root pervius itself derives from per- (through) + via (way, road), implying something that cannot be passed through. The word evolved in English during the 16th century, initially in legal and architectural contexts to describe materials or structures that offered no passage or leakage. Over time, its figurative use broadened to describe mental or emotional walls that resist external influence. The prefix in- intensifies the negation, reinforcing the sense of obstruction or impermeability. Early uses appear in technical descriptions of walls and barriers, and later in more abstract senses such as “not affected by” opinions or pressures. By the 19th and 20th centuries, imperial and portable contexts introduced the idea of resilience against weather, criticism, or other forces. In modern usage, impervious often carries a slightly negative or assertive tone, implying a stubborn or uncompromising stance, although it can simply denote high resistance in materials or conditions.
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Words that rhyme with "Impervious"
-ous sounds
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