This is the 93rd most frequent Thai word.
บ
The Thai word "บ" represents the letter "Boh Baimai" in the Thai alphabet. It is also sometimes used as an abbreviation for certain words like "บาท" (baht).
In this sentence, 'บ' refers to the Thai alphabetical character.
นักเรียนเขียนตัวอักษร บ ในสมุดจด
The student wrote the letter 'บ' in the notebook
Here, 'บ' represents an onomatopoeic sound similar to 'shh' used to imply silence.
ผู้ใหญ่ต้องการห้ามเสียงดัง โดยใช้นิ้วแตะที่ปากและบอก "บ"
The adult wanted to stop the noise by placing a finger to the lips and saying "shh"
In this case, 'บ' is part of the abbreviation 'บขส' for the Thai term referring to the central bus station.