ที่

From Proto-Tai *diːᴮ, possibly from Middle Chinese 地 (MC dijH).^[1] Cognate with Lao ທີ່ (thī), Northern Thai ᨴᩦ᩵, Lü ᦑᦲᧈ (tii¹), Tai Dam ꪕꪲ꪿, Tai Dón ꪕꪲꫀ, Shan တီႈ (tīi), Tai Nüa ᥖᥤ (ti), Phake တီ (tī), Ahom 𑜄𑜣 (tī), Zhuang deih, Zuojiang Zhuang thi. Outside Tai-Kadai: compare Proto-Mon-Khmer *tiʔ ~ tiiʔ ~ tiəʔ (“that yonder”), Mon တေံ (teʔ, “that”), Khmer ទី (tii), Vietnamese thì (“then, which, to be”). Compare Malay di.

ที่ • (tîi)

1. at; to; on the site of; within; amidst; at the location of.
2. for; during; at the time of.

ที่ • (tîi)

1. land; place; area; seat (booking and reservations); site; location.
2. position; office.

ที่ • (tîi)

1. Classifier for places, locations, servings. ⇒ all nouns using this classifier

ที่ • (tîi)

1. relative pronoun; that; which; that which; who; whom.

   ลูกคนที่สาม

   lûuk kon tîi sǎam

   the third child.

   เขาเป็นคนที่จ่าย

   kǎo bpen kon tîi jàai

   He is the one who paid.

   ขอโทษที่เป็นแบบนี้

   kɔ̌ɔ-tôot tîi bpen bɛ̀ɛp níi

   I'm sorry for being like this.

   เราดีใจที่หน้าร้อนผ่านไปแล้ว

   rao dii-jai tîi nâa rɔ́ɔn pàan bpai lɛ́ɛo

   We're pleased (that) the hot season is over.

   ร่ำลาเจ้าของที่ห่วงใย แล้วมุ่งหน้าเข้าสู่หมู่บ้าน

   râm-laa jâo-kɔ̌ɔng tîi hùuang-yai · lɛ́ɛo mûng-nâa kâo sùu mùu-bâan

   After bidding farewell to the worried owner, it headed towards the village.

2. where; when.

ที่

1. (creating a noun from a verb) the person who.

   ที่ปรึกษา

   tîi bprʉ̀k-sǎa

   advisor.

2. (creating a noun from a verb) an object pertaining to which; that which; an object for; for the purpose of; equipment or gear for a purpose.

   ที่เปิดขวด

   tîi bpə̀ət kùuat

   bottle opener.

3. (creating a noun from a verb) a concept or idea pertaining to which.
4. (creating a noun from a verb) a place or location pertaining to which; a place to do something.
5. (creating a noun from a verb) an event, time, duration, or occurrence pertaining to which.
6. used with cardinal numbers to create ordinals. (Compare Chinese 第 (dì).)

   บทที่หนึ่ง

   bòt tîi nʉ̀ng

   lesson one / the first lesson

7. used to indicate comparisons or ordering.

ที่ • (tîi)

1. placed after an adjective to indicate that it applies particularly and specifically to its preceding noun. (Can we add an example for this sense?)
2. used in the pattern “เป็น (bpen) + ที่ + verb” to make an adjective from a verb.

• “ที่” in Thai Dictionary Project (TDP) (UC Berkeley 1964) (plus additional data from the Royal Institute of Thailand (RI) and NECTEC's LEXITRON project (LEX)). Searchable online at SEAlang.net.