Vocabulary: Academic & Formal Vocabulary (C1) - Lesson 6: Using Sophisticated Formal Vocabulary & Grammatical Structures with Precision

Academic English C1

Precision & Formal Tone

ការប្រើប្រាស់ពាក្យផ្លូវការ និងច្បាស់លាស់

🖋️

FORMAL

ផ្លូវការ

🎯

PRECISE

ច្បាស់លាស់

📜

STRUCTURE

រចនាសម្ព័ន្ធ

Avoid "Basic" Words 🚫

At C1 level, avoid general words like "good," "bad," "big," or "get." Use specific, sophisticated synonyms.

🏛️ Precise Verbs

Facilitate

/fəˈsɪlɪteɪt/

សម្របសម្រួល / ធ្វើឱ្យងាយស្រួល

Instead of "Help" or "Make easy": "The new software will facilitate remote work."

Elaborate

/ɪˈlæbəreɪt/

ពន្យល់លម្អិត / បរិយាយ

Instead of "Explain more": "Could you please elaborate on that point?"

Substantiate

/səbˈstænʃieɪt/

ដាក់ភស្តុតាងបញ្ជាក់

Instead of "Prove": "You must substantiate your claims with data."

🧐 Sophisticated Adjectives

Ubiquitous

/juːˈbɪkwɪtəs/

ដែលមាននៅគ្រប់ទីកន្លែង

Instead of "Everywhere": "Smartphones have become ubiquitous in modern society."

Detrimental

/ˌdɛtrɪˈmɛntl/

ដែលផ្តល់ផលប៉ះពាល់អាក្រក់

Instead of "Bad" or "Harmful": "Smoking has a detrimental effect on health."

Ambiguous

/æmˈbɪɡjuəs/

ដែលមិនច្បាស់លាស់ (មានន័យច្រើន)

Instead of "Unclear": "The instructions were ambiguous, leading to confusion."

📐 Advanced Structures

Inversion

Structure: Negative Adverb + Aux Verb + Subject "Seldom have I seen such dedication."
(កម្រណាស់ដែលខ្ញុំបានឃើញការលះបង់បែបនេះ)

Participle Clause

Use: To combine sentences or show cause/time "Having finished the report, he left the office."
(បន្ទាប់ពីបញ្ចប់របាយការណ៍ គាត់បានចាកចេញពីការិយាល័យ)

Academic Proficiency 🎓

Select the most precise option.

Replace "made easier":
"The internet has _____ global communication."

Which word implies "Harmful"?

Select the correct Inversion:

Mission 📝

Upgrade Your Writing

Rewrite these sentences:

In your notebook, rewrite these basic sentences using the new vocabulary.

1. "Pollution is bad for the environment."
(Use: Detrimental)

2. "Mobile phones are everywhere now."
(Use: Ubiquitous)

3. "Can you explain your idea more?"
(Use: Elaborate)