Definition

1. Adverb phrase:
   • Surely enough, certainly enough: Used to express a high degree of certainty or strong probability about a statement or assumption. It indicates the speaker's confidence that something is true or will happen.

Usage Examples

• Adverb phrase:
  • Trời mưa to thế này, hẳn là đường sẽ rất tắc. (It's raining so heavily; surely the traffic will be very congested.)
  • Cô ấy không trả lời điện thoại, hẳn là đang rất bận. (She's not answering the phone; she must certainly be very busy.)
  • Anh ấy đã học rất chăm chỉ, hẳn là sẽ thi đỗ. (He studied very hard; he will surely pass the exam.)

Advanced Usage

• "Hẳn là... rồi": Used to reinforce a conclusion about a past or present situation.

  • Đèn phòng anh ấy tắt, hẳn là anh ấy ngủ rồi. (The light in his room is off; he must have gone to sleep already.)

• "Thế thì hẳn là...": Used to draw a logical conclusion from given information ("In that case, it must be that...").

  • Anh ấy là người Hà Nội gốc à? Thế thì hẳn là anh ấy biết phố cổ rất rõ. (He's a native of Hanoi? In that case, he must certainly know the Old Quarter very well.)

Variants and Related Words

• Chắc hẳn là (adv phrase): Surely, certainly. A slightly more common variant with the same meaning.

  • Chắc hẳn là cô ấy sẽ đồng ý. (She will surely agree.)

• Hẳn (adv): Surely, certainly. A shorter, sometimes more literary form.

  • Người ấy *hẳn phải là một nghệ sĩ tài ba.* (That person must surely be a talented artist.)

Synonyms

• Chắc chắn là (adv phrase): Definitely, certainly.
• Hầu như chắc chắn (adv phrase): Almost certainly.
• Có lẽ (adv): Perhaps, probably. (Note: This indicates lower certainty than "hẳn là").

Related Phrases / Idioms

• "Hẳn nhiên" / "Đương nhiên": Naturally, of course. Used to state something is obvious or self-evident.
  • Là sinh viên, hẳn nhiên bạn phải chăm chỉ học tập. (As a student, you naturally have to study diligently.)

Notes on Meaning

• "Hẳn là" vs. "Có lẽ": While both can be translated as "probably," "hẳn là" expresses a stronger conviction and higher probability (e.g., 90% sure) based on evidence or logic. "Có lẽ" is more tentative (e.g., 50-70% sure).
• Logical Deduction: "Hẳn là" is often used for conclusions drawn from observable facts or common sense, similar to "must be" in English for logical assumptions.

1. Surely enough, certainly enough