Within in Thai

“Within” in Thai is ภายในpaai-nai.

ภายใน paai-nai

within, inside; internal (formal) preposition

paai mid
nai mid

Mid: level, in your normal speaking voice.

How to use it

ภายในpaai-nai is "within, inside" for buildings, organisations and deadlines: ภายในบริษัทpaai-nai baw-rí-sàt, in-house. For a time limit it's normal in speech too: ภายในวันนี้paai-nai wan-níi, by the end of today.

For places, conversation uses ข้างในkâang-nai, inside: รอข้างในraw kâang-nai, wait inside. Its opposite is ภายนอกpaai-nâwk, outside, external, as in บุคคลภายนอกbùk-kon paai-nâwk, outsiders.

Other spellings you'll see

There's no single official way to write Thai in English letters. We mark the tone of every syllable; online you'll also find:

phai nai
pai nai
phainai

More formal words in Thai

All formal words

การ gaan Kaan (prefix)
-ing, -tion: turns a verb into a noun (the act of …)
ความ kwaam Kwaam (prefix)
-ness (turns a verb or adjective into a noun)
ผู้ pûu Phu (prefix)
person (who …): makes words for people, like -er
นัก nák Nak (prefix)
-er, -ist: someone who does it (as a job or a passion)
ซึ่ง sûeng Who, which (formal)
which, who (adds information; formal, written)
เมื่อ mûea When (formal)
when, once (formal)

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Written by the Learn Thai For Free team
Audio: AI voices, quality-checked for tones