Meaning
Used when you lack certainty about a fact.
Cultural Background
The phrase is a key component of 'Kreng Jai.' It allows people to avoid giving a direct 'No,' which is often considered harsh or impolite in Thai social hierarchy. In Thai offices, 'ไม่ค่อยแน่ใจ' is often used by subordinates to signal that a plan might have flaws without directly criticizing their superiors. While the central phrase is understood, regional dialects might use different softeners, but 'ไม่ค่อยแน่ใจ' remains the prestige form for formal interactions. Younger Thais often use 'ไม่ค่อยชัวร์' (mâi kôi shua) in LINE chats, reflecting the influence of English on modern Thai slang.
The 'Krap/Ka' Rule
Always add 'ครับ' (kráp) or 'ค่ะ' (kâ) at the end to make this phrase truly polite and natural.
Don't over-soften
If you say 'ไม่ค่อยแน่ใจ' about something you definitely should know, you might look unprepared.
Meaning
Used when you lack certainty about a fact.
The 'Krap/Ka' Rule
Always add 'ครับ' (kráp) or 'ค่ะ' (kâ) at the end to make this phrase truly polite and natural.
Don't over-soften
If you say 'ไม่ค่อยแน่ใจ' about something you definitely should know, you might look unprepared.
The 'Wâa' Connector
Master the word 'ว่า' (wâa) to link this phrase to any sentence. It's the key to intermediate Thai fluency.
Face Saving
Use this phrase if you have to disagree with someone older than you. It saves their 'face' by making it about your uncertainty.
Test Yourself
Fill in the missing word to say 'I'm not quite sure.'
ผม____ค่อยแน่ใจครับ
'ไม่' (mâi) is needed to negate the phrase.
Which sentence means 'I'm not quite sure about the price'?
Select the correct Thai translation:
'เรื่อง' (rêuang) is used to mean 'about' a topic.
Complete the dialogue with the most polite response.
A: พรุ่งนี้คุณจะมาไหม? (Will you come tomorrow?) B: _________
This is the most polite and natural way to express uncertainty in Thai.
Match the phrase to the situation.
You are asked for directions but you only think you know the way.
Using 'ไม่ค่อยแน่ใจ' provides a helpful but cautious answer.
🎉 Score: /4
Visual Learning Aids
Directness Scale
Practice Bank
4 exercisesผม____ค่อยแน่ใจครับ
'ไม่' (mâi) is needed to negate the phrase.
Select the correct Thai translation:
'เรื่อง' (rêuang) is used to mean 'about' a topic.
A: พรุ่งนี้คุณจะมาไหม? (Will you come tomorrow?) B: _________
This is the most polite and natural way to express uncertainty in Thai.
You are asked for directions but you only think you know the way.
Using 'ไม่ค่อยแน่ใจ' provides a helpful but cautious answer.
🎉 Score: /4
Frequently Asked Questions
10 questionsIt is neutral. It works with your boss (with polite particles) and with your friends.
Yes, but it's slightly more direct. Adding 'ค่อย' (kôi) makes it softer and more common in polite conversation.
'ไม่แน่ใจ' is about facts/information. 'ไม่มั่นใจ' is about confidence or self-assurance.
Add 'ยัง' (yang) at the beginning: 'ยังไม่ค่อยแน่ใจ' (yang mâi kôi nâe jai).
In Thai, most mental and emotional states are expressed as conditions of the heart.
Yes, it is very common in business Thai to express tentative information.
Yes, but only in casual settings or with colleagues you know well.
Sometimes. In Thai culture, it can be a polite way to decline an invitation or disagree.
It is a falling tone (โท).
Yes: 'ไม่ค่อยแน่ใจว่าชอบไหม' (mâi kôi nâe jai wâa chôp măi).
Related Phrases
ไม่แน่ใจ
similarI'm not sure.
ไม่มั่นใจ
specialized formNot confident.
สงสัย
relatedTo suspect or wonder.
เป็นไปได้
contrastIt's possible.
ชัวร์
synonymSure (loanword).
