英語で「actinides」はどう発音する？
AC·ti·ni·des
第1強勢： ac
実際の動画クリップの中でネイティブが文脈に合わせて「actinides」を発音するのを聴く
Linguistic Pronunciation Masterclass: “actinides”
Phonetic mechanics, syllable architecture, and conversational cadence
Syllable Architecture & Stress Distribution
AC
Elevated pitch, sustained vowel length, and full acoustic clarity.
ti
Reduced vowel sound, relaxed jaw, and minimal vocal effort.
ni
Reduced vowel sound, relaxed jaw, and minimal vocal effort.
des
Reduced vowel sound, relaxed jaw, and minimal vocal effort.
Primary emphasis falls on the first syllable ("AC"). Raise your pitch and sustain the vowel length on this syllable while relaxing the surrounding syllables.
Common Pronunciation Traps & Learner Mistakes
The Trap: Avoid pronouncing every vowel with full acoustic weight. Non-native speakers often over-enunciate unstressed vowels.
How Native Speakers Say It: Only give full vowel clarity to the primary stressed syllable. Relax all unstressed vowels into a neutral, low-energy schwa (⁄ə⁄).
Connected Speech & Natural Conversational Flow
When "actinides" is followed by a word starting with a vowel, glide the final consonant into the opening vowel (e.g. "actinides is" sounds like "actinides-iz").
Maintain the stress-timed rhythm of English: compress unstressed syllables rapidly so the beat of "actinides" aligns naturally with adjacent words.
Authentic Spoken Quotes from Native Video Context
“okay now um for actinides let me go back for this part of the effort uh the”— StanfordWatch clip
“They are actually kind of crazy actinides are, uh, they contain all the elements that we make nuclear weapons out of.”— SciShowWatch clip
“These are called the actinides.”— MIT OpenCourseWareWatch clip
“including all known lanthanides and actinides go ahead break a chair on me the kids never lonely when he has”— Native SpeakerWatch clip
“species for actinides in solution and when we try to model it we're uh stuck U”— StanfordWatch clip
“actinides I don't know why they made that change but they did apparently unsettled by the effectiveness of the nuclear weapons that were derived from”— SciShowWatch clip
「actinides」のスピーキング練習
ネイティブの発音を聞き、マイクに向かってセンテンスを復唱すると、リアルタイムで単語ごとの発音精度スコアが表示されます。
okay now um for actinides let me go back for this part of the effort uh the
文脈で聴く: “actinides”
52 件のクリップThe 英語 word “actinides”. Phonologically, it consists of 4 syllables (ac · ti · ni · des), with primary lexical stress placed on the 1st (initial) syllable (ac). Grammatically, “actinides” functions as a noun. SayItVid indexes 52 authentic 英語 video clips demonstrating how native speakers articulate “actinides” in natural connected speech across American (US: 8 sampled), British (UK), and Australian (AUS) accents, including verified broadcasts from Stanford, SciShow, MIT OpenCourseWare.
Spoken Video Transcripts & Contextual Quotes (5 Verified Clips)
- 🇺🇸 USStanfordClip #1 · @25:10
“of repository and just do some materials design make something that that matches okay now um for actinides let me go back for this part of the effort uh the problem with actinides is when you put them into a material um they suffer”
- 🇺🇸 USSciShowClip #2 · @0:56
“and bring it down because, it's just too big. You gotta- it just big... gotta break it off. They are actually kind of crazy actinides are, uh, they contain all the elements that we make nuclear weapons out of. But the lanthanides on top there. they contain all the elements that we make nuclear weapons out of. But the lanthanides on top there.”
- 🇺🇸 USMIT OpenCourseWareClip #3 · @46:37
“innovative naming. These are called the actinides. OK.”
- 🇺🇸 USClip #4 · @3:35
“reconsider it someone's cranky I listen with no keep Crusader mom bargman including all known lanthanides and actinides go ahead break a chair on me the kids never lonely when he has the kids never lonely when he has”
- 🇺🇸 USStanfordClip #5 · @22:16
“magnitude this represents the fact we don't know much about the soluble species for actinides in solution and when we try to model it we're uh stuck U uh in terms of coming up with reasonable models uh are another other way to say”
意味と定義: “actinides”
- Any of the 15 radioactive elements of the periodic table from actinium to lawrencium that are positioned under the lanthanides, to which they have similar chemistry.
- Any of the 14 elements from actinium to nobelium (lawrencium is excluded by some authors as it is a d-block rather than an f-block element).
動画内の例文 (2)
- “okay now um for actinides let me go back for this part of the effort uh the”
- “They are actually kind of crazy actinides are, uh, they contain all the elements that we make nuclear weapons out of. But the lanthanides on top there.”
よく使われるフレーズ・コロケーション
発音が全く同じ単語（同音異義語）
固有の発音「actinides」 には一般的な語彙において同音異義語がありません。
「actinides」に関するよくある質問
「actinides」の音節（シラブル）数はいくつですか？
「actinides」には 4 つの音節があります：ac · ti · ni · des。
「actinides」のアクセント（強勢）はどこですか？
「actinides」の第1強勢（主アクセント）は「AC」にあります。動画内の強勢の置かれ方に注目して聴いてみてください。
「actinides」の意味は何ですか？
Any of the 15 radioactive elements of the periodic table from actinium to lawrencium that are positioned under the lanthanides, to which they have similar chemistry.
「actinides」が実際に使われている文を聞くには？
このページには、字幕付きの動画例文が 52 件収録されています。「前へ / 次へ」（または矢印キー ← / →）を使って発音される瞬間をピンポイントで再生できます。
What is the most common pronunciation mistake when saying “actinides”?
Avoid pronouncing every vowel with full acoustic weight. Non-native speakers often over-enunciate unstressed vowels. Only give full vowel clarity to the primary stressed syllable. Relax all unstressed vowels into a neutral, low-energy schwa (⁄ə⁄).