Levels & career tracks
Curso básico · A1–A2
Nivel A1.1 — IdentidadNivel A1.2 — Rutinas y entornoNivel A2.1 — Contando el mundoNivel A2.2 — Comparando y proyectandoIntermedio · B1–B2
Level B1.1 — Connecting experiencesLevel B1.2 — Narrating and describingLevel B2.1 — ArguingLevel B2.2 — NuanceProfesional / Avanzado · C1–C2
Level C1.1 — PrecisionLevel C1.2 — Register and discourse Current levelLevel C2.1 — StyleLevel C2.2 — Native masteryInglés técnico y especialización
Career Track BusinessCareer Track Economics and FinanceCareer Track Business AdministrationCareer Track Information Systems EngineeringCareer Track Educational SciencesCareer Track Medicine and Health SciencesCareer Track Tourism and HospitalityCareer Track Occupational Health and SafetyCareer Track Legal EnglishAt C1, precision means choosing the exact word that fits — not just "important," but "crucial," "pivotal," or "marginal," each carrying a different shade of meaning. These are core terms from the Academic Word List, used constantly in essays, research, and professional writing.
Why this matters This lesson connects directly to your progress: it covers degrees of importance; ways to show or prove something; core academic word list terms. Mastering this content lets you move forward confidently, and reinforces patterns you'll use again later. Take time to review every example before moving to the assessment — repetition is what actually locks knowledge in long-term.
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The goals of this lesson.
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You already have solid general vocabulary. This lesson refines it with nuanced academic synonyms — words from the Academic Word List that replace common but imprecise choices.
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These words all relate to "important," but they carry different intensities — from "marginal" (barely) to "crucial" (essential).
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More precise alternatives to "show" or "prove," each with a specific academic function.
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High-frequency words from academic and professional English that appear across every field of study.
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Usa las pistas para completar cada palabra en inglés. Sin calificar — repite las veces que quieras.
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The essentials of this lesson, summarized.
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Key terms to remember.
extremely important; essential to success or a decision
Emphasizes urgency and necessity more strongly than "important"; common in academic argumentation.
Formal / academicCollocations: crucial role, crucial factor, absolutely crucial
Synonyms: essential, critical, vital
central and critically important to how something develops
Suggests a turning point — something the outcome depends on — slightly more literary than "crucial".
Formal / academicCollocations: pivotal role, pivotal moment, pivotal figure
Synonyms: central, key, decisive
forming a necessary base or core; basic and essential
Refers to something foundational, without which the rest cannot function — often paired with abstract nouns like "principle" or "right".
Formal / academicCollocations: fundamental principle, fundamental right, fundamentally flawed
Synonyms: basic, essential, core
large in amount, degree, or importance
Used for quantities or effects that are sizeable but not necessarily decisive — common in describing statistics.
Formal / academicCollocations: substantial amount, substantial evidence, substantial increase
Synonyms: considerable, significant, sizeable
important enough to be worth noting or having an effect
The standard academic hedge word for describing a meaningful (often statistically supported) effect or difference.
Formal / academicCollocations: significant difference, significant impact, statistically significant
Synonyms: notable, considerable, meaningful
barely significant; having only a small effect
The near-opposite of "significant" — used to downplay the size of an effect, often in a nuanced academic comparison.
Formal / academicCollocations: marginal improvement, marginal cost, marginal difference
Synonyms: minor, slight, negligible
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Listen to the full dialogue with the speaker buttons first, then fill in the missing words from this lesson's real conversation. Ungraded — repeat as many times as you like.
How would you describe the of the
The were fairly not conclusive as we'd hoped.
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You need at least 80% to unlock the next lesson. You can retake it as many times as you want — your best score is saved.
1. Which option matches: "Coherent"?
2. Select the correct match for: "Marginal"
3. Select the correct match for: "Corroborate"
4. Select the correct match for: "Inherently"
5. "Reinforce" — which one is correct?
6. What does this mean: "Substantiate"?
7. Choose the equivalent of: "Illustrate"
8. "Underscore" — which one is correct?
9. What does this mean: "Pivotal"?
10. Choose the equivalent of: "Consequently"
Review — Lesson 55 What matches: "It seems that the strategy has been effective."?
Review — Lesson 55 What matches: "Generally speaking, the strategy has proven successful."?
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You've completed C1! Your vocabulary is now precise and academic. Next: C2, the final stretch toward native-level fluency.
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Practice this lesson's vocabulary with a word search and flashcards. Ungraded — play as many times as you like.
Tap the first and last letter of a hidden word to find it. Los términos de varias palabras van sin espacios en el tablero (ej. "give up" aparece como GIVEUP).
Elige la respuesta correcta. Si aciertas, la tarjeta queda lista por hoy; si fallas, vuelve a aparecer pronto para reforzarla. Tu progreso se guarda en este dispositivo.