RianThai — Learn Thai: Dictionary, Alphabet, and Reference Tools
Free Thai-English dictionary with audio pronunciation

Learn ภาษาไทย
at your own pace

A Thai-English dictionary with Pali and Sanskrit word origins, alphabet guides, pronunciation for every word, and interactive learning tools.

English ↔ Thai
Pali & Sanskrit origins
3 source dictionaries
Everything in one place

Tools for every stage of learning

From your first letter to reading Thai text — dictionary, alphabet, and reference tools all in one place.

Dictionary

The Thai-English dictionary combines data from three sources:

  • Royal Institute Dictionary (พจนานุกรม ฉบับราชบัณฑิตยสถาน) — the official Thai monolingual dictionary with English translations of definitions
  • Volubilis — a Franco-Thai lexicographic project with detailed definitions and classification
  • Lexitron — a Thai-English dictionary developed by Thailand's National Electronics and Computer Technology Center (NECTEC)

Over 19,000 words with English translations based on data from Wiktionary and the Royal Institute Dictionary. Audio pronunciation for all Thai and English words, Pali and Sanskrit etymologies, classifiers, antonyms, synonyms, and usage examples.

Reference Tools

  • Thai Alphabet — 44 consonants and 32 vowels with pronunciation and consonant classes
  • Thai Numbers — numerals with transliteration and audio
  • Thai Calendar — Buddhist era dating, months, days of the week, Thai and Buddhist holidays
  • Pali Transliteration — convert between Pali scripts and Roman transliteration