2 syllables: im, pair. Stress on pair.
im-PER
/ˌɪˈmpɛɹ/
impair is pronounced im-PER (/ˌɪˈmpɛɹ/). It has two syllables (im-pair), with the stress on "pair". Impair is a verb meaning to weaken, damage, or reduce the effectiveness, value, or usefulness of something. It typically refers to harming a function, ability, or quality, making it less strong or capable than before. In legal and clinical contexts, it can describe diminished capacity or impairment of judgment, health, or performance.
Impair is a verb meaning to weaken, damage, or reduce the effectiveness, value, or usefulness of something. It typically refers to harming a function, ability, or quality, making it less strong or capable than before. In legal and clinical contexts, it can describe diminished capacity or impairment of judgment, health, or performance.
"The heavy rain could impair visibility on the highway."
"Alcohol can impair your judgment after drinking."
"Certain medications may impair motor coordination."
Stress is on the second syllable: im-PAIR. Phonemes: /ɪmˈpɛər/ in US and UK standards; in American speech the vowel in the second syllable tends to a mid-front vowel plus rhoticity, approximating /ɪmˈper/ with a lighter /pɛər/ or /pɪər/; ensure the /p/ is aspirated. Tip: start with /ɪm/, then blow air into a tight, rounded mouth for /ˈpɛər/ or /ˈpeə/. A good reference point is hearing /ɪmˈpɛər/ in careful pronunciation resources.
Two frequent errors: (1) misplacing stress, saying im-PAIR with equal emphasis, or saying im-PAIR with incorrect position; (2) mispronouncing the second syllable as /ər/ instead of /ɛər/ in non-rhotic accents; correct by shaping the lips for /p/ and lowering the jaw for /ɛə/; practice by isolating /pɛər/ and linking to the /ɪm/ onset. Ensure the /m/ is fully formed and the /p/ is released with a small puff of air.
In US English, /ɪmˈpɛər/ with a rhotic ending commonly realized as /ɪmˈpeər/ in faster speech; the second syllable has a clear /ɛə/ or /eə/ vowel diphthong. UK English tends toward non-rhoticity with /ɪmˈpeə/ (no rhotic /r/); the vowel in the second syllable remains a diphthong, often closer to /eə/. Australian English typically maintains /ɪmˈpeə/ with a slightly longer, broader /eə/ diphthong and less distinct /r/ in most speaker variants. IPA indicates the key differences in rhoticity and vowel quality.
Primary challenges are the short, clipped onset /ɪm/ followed by the voiceless aspirated /p/ and the tense, mid-front diphthong in the second syllable /pɛər/. The combination of an unstressed /ɪ/ plus a prominent /p/ release can cause nasal or vowel length distortions. Also, non-native speakers may flatten the second syllable vowel, turning /ɛə/ into /e/ or /æ/. Focus on a clear /p/ release and a tight, rounded lip position for the /ɛə/ diphthong.
A common nuance question is whether the second syllable vowel may be realized as /eə/ instead of /ɛər/ in some dialects; the main point is to preserve the diphthongal quality moving from a short /ɪ/ to a longer, tense vowel on the second syllable with a crisp /p/ onset. Practicing with minimal pairs like 'pearl' vs 'pair' can reveal subtle differences in rounding and vowel height across dialects.
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Impair originates from Middle English impairen, from Old French empraer, from Latin in- 'not' + praeparare 'to prepare, equip'. Over time, the sense shifted from preparing or equipping to causing weakness or harm by undermining function or capability. The prefix im- (variant of in-) attaches to the Latin praeparare; the term entered English in the 14th–15th centuries, initially meaning to spoil or deprive of strength or usefulness. In legal and medical language, impairment has become a fixed noun-form referring to a condition of diminished capacity, while as a verb it continues to denote the act of diminishing or damaging. The word gained commonality in modern English through judicial, medical, and scientific discourses, where precise impairment (in structures, faculties, or processes) conveys measurable detriments rather than mere damage. The evolution reflects a shift from general weakening to a formal term indicating reduced functioning or capacity in specific domains (cognitive, physical, sensory, or functional), now embedded in professional lexicons as both a transitive verb and a noun (impairment). First known uses appear in Middle English legal texts and later in medical writings, where impairment of sight, hearing, and motor function were described with growing precision. Across centuries, the word retained its core meaning of reducing effectiveness while acquiring nuance in legal and clinical contexts.
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💡 These words have similar meanings to "impair" and can often be used interchangeably.
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Words that rhyme with "impair"
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