Thai has 5 tones but only 4 tone marks (วรรณยุกต์). The fifth tone (mid tone) has no mark — it's the default. Understanding these marks is crucial because the same syllable can mean completely different things depending on its tone.
Before learning the marks, understand the five tones:
| Tone | Thai Name | Contour | Description |
|---|---|---|---|
| Mid | สามัญ (sǎa-man) | — | Flat, neutral pitch |
| Low | เอก (èek) | ˋ | Low and flat |
| Falling | โท (thoo) | ˆ | Starts high, drops |
| High | ตรี (dtrii) | ˊ | High and flat |
| Rising | จัตวา (jàt-dtà-waa) | ˇ | Low then rises |
Here's where Thai gets interesting: the same tone mark produces different tones depending on the consonant class!
| Tone Mark | Middle Class | High Class | Low Class |
|---|---|---|---|
| (none) | Mid | Rising | Mid |
| ่ (mai ek) | Low | Low | Falling |
| ้ (mai tho) | Falling | Falling | High |
| ๊ (mai tri) | High | — | — |
| ๋ (mai chattawa) | Rising | — | — |
Key insight: Mai tri (๊) and mai chattawa (๋) are only used with middle-class consonants.
The most common tone mark. It creates:
| Class | Example | Tone | Meaning |
|---|---|---|---|
| Middle | ก่า (gàa) | Low | — |
| High | ข่า (khàa) | Low | galangal |
| Low | ค่า (khâa) | Falling | price |
The second most common mark:
| Class | Example | Tone | Meaning |
|---|---|---|---|
| Middle | ก้า (gâa) | Falling | — |
| High | ข้า (khâa) | Falling | slave (archaic) |
| Low | ค้า (kháa) | High | trade |
Only used with middle class consonants to create a high tone:
| Example | Tone | Meaning |
|---|---|---|
| ก๊วน (guán) | High | group (slang) |
Only used with middle class consonants to create a rising tone:
| Example | Tone | Meaning |
|---|---|---|
| — | Rising | (rare) |
Note: Mai tri and mai chattawa are relatively rare and mostly appear in loanwords or slang.
The word มาย/มาย/ม้าย demonstrates tone importance:
| Written | Tone | Meaning |
|---|---|---|
| มา | Mid | to come |
| หมา | Rising | dog |
| ม่า | Low | horse (Teochew) |
| ม้า | Falling | horse |
| หม่า | Low | (rare) |
(Note: Some of these are rare or dialectal)
Identify the tone marks in these words:
Understanding how the same tone mark produces different tones by class:
| Tone Mark | Middle Class Example | High Class Example | Low Class Example |
|---|---|---|---|
| (none) | กา (gaa) - Mid | ขา (khǎa) - Rising | คา (khaa) - Mid |
| ◌่ (mai ek) | ก่า (gàa) - Low | ข่า (khàa) - Low | ค่า (khâa) - Falling |
| ◌้ (mai tho) | ก้า (gâa) - Falling | ข้า (khâa) - Falling | ค้า (kháa) - High |
| ◌๊ (mai tri) | ก๊า (gáa) - High | (not used) | (not used) |
| ◌๋ (mai chattawa) | ก๋า (gǎa) - Rising | (not used) | (not used) |
Key insight: Notice how ค้า (low-class + mai tho) produces HIGH tone — this is the famous exception!
In Lesson 8, you'll learn the complete tone rules — how to determine the tone of any syllable based on consonant class, vowel length, and final consonant.