น้อง

From Proto-Tai *nwoːŋꟲ (“younger sibling”). Cognate with Northern Thai ᨶᩬ᩶ᨦ, Lao ນ້ອງ (nǭng), Lü ᦓᦸᧂᧉ (noang²), Tai Dam ꪙ꫁ꪮꪉ, Shan ၼွင်ႉ (nâ̰ung), Ahom 𑜃𑜨𑜂𑜫 (nong), Bouyei nuangx, Zhuang nuengx, nongx, Tày noọng.

น้อง • (nɔ́ɔng) (classifier คน)

1. younger brother; younger sister.
2. younger person.
3. (slang) baby; infant; young child.

   มีน้อง

   mii nɔ́ɔng

   to have a baby (= to be pregnant)

4. (slang, sometimes considered offensive) subordinate; inferior; servant.
5. used as a title or term of address
   1. used as a title for or term of address to a younger brother, younger sister, or younger person; used by such person to refer to oneself when speaking to an elder brother, elder sister, or older person.
   2. used as an affectionate title for or term of address to a beloved, younger person; used by such person to refer to oneself when speaking to a beloved, older person.
   3. (slang) used as an affectionate title for or term of address to an animal or object.
      • 2021 March 6, ภัทรานิษฐ์ ลิ้มปติยากร, 3:34 from the start, in น้ำตาแทบไหล !!! 400,000 Sub แบบโจ๊ะโจ๊ะ!!‎, กรุงเทพฯ: ภัทรานิษฐ์ ลิ้มปติยากร, via Loverrukk:

        น้องช่วยซึมซับน้ำและสิ่งสกปรกได้ดีกว่ากระดาษทั่วไป

        nɔ́ɔng chûai sʉm-sáp náam lɛ́ sìng sòk-gà-bpròk dâai dii gwàa grà-dàat tûua-bpai

        It helps absorb liquid and dirty things better than general [tissue] paper.

   4. (colloquial, sometimes considered offensive) used as a title for or term of address to a subordinate, inferior, or servant.